bigram

This is a table of type bigram and their frequencies. Use it to search & browse the list to learn more about your study carrel.

bigram	frequency
charles darwin	858
natural selection	789
sexual selection	433
natural history	397
one part	368
south america	341
del fuego	277
every one	268
tierra del	258
asa gray	257
new zealand	241
one side	226
distinct species	222
many years	206
years ago	196
captain fitz	192
organic beings	184
upper part	179
good deal	178
see also	176
lower animals	173
sexual differences	170
geographical distribution	169
two species	169
one day	165
dear sir	164
november th	164
north america	163
well known	155
two sexes	154
greater number	150
dear hooker	147
british association	145
march th	145
one species	145
april th	143
closely allied	141
glen roy	140
second edition	139
may th	139
certain extent	138
almost every	137
linnean society	137
sexual characters	136
much obliged	134
united states	133
buenos ayres	132
changed conditions	131
following letter	130
december th	129
geological society	129
caudal appendages	128
many thanks	127
secondary sexual	127
glacial period	126
lower part	125
know whether	123
volume ii	119
widely different	119
sir joseph	118
two days	117
one sex	116
see letter	115
feel sure	115
domesticated animals	114
long time	113
will give	113
june th	112
february th	112
fitz roy	110
royal society	107
next morning	106
january th	105
new species	104
new edition	104
closely inflected	104
may add	103
september th	103
three leaves	103
several times	103
large number	103
exterior tentacles	102
short time	101
allied species	100
doubt whether	100
bright colours	100
domestic animals	100
much interested	100
de la	99
motor impulse	99
three days	99
many cases	98
direct action	97
british museum	97
four leaves	95
october th	95
much like	94
basal margin	94
two years	94
next day	94
edition ii	94
present day	94
bahia blanca	93
raw meat	93
sir charles	92
animal matter	91
good hope	90
first edition	90
several species	89
much less	89
see life	89
many species	89
falkland islands	89
zoological gardens	88
years old	87
close interbreeding	86
dare say	84
la plata	83
first cirrus	83
three years	83
tentacles inflected	83
dear lyell	83
july th	82
will send	82
de candolle	82
feet high	81
occludent margin	81
joseph hooker	79
coral reefs	79
father wrote	79
upper surface	78
see origin	78
first pair	77
will see	77
thousand feet	77
greater part	76
one another	76
rio negro	76
sexual difference	75
external conditions	75
two forms	75
shall see	75
two distinct	74
south american	73
several years	73
domestic races	73
august th	73
zoological society	72
almost always	71
three species	71
may infer	71
monte video	70
sixth cirrus	70
different parts	70
west coast	69
volume page	69
much pleased	69
will make	69
one leaf	68
males alone	67
every part	67
old friend	67
different species	67
first part	66
wild animals	66
long ago	66
cultivated plants	66
many kinds	66
volcanic islands	65
inferior angle	65
natural species	65
opposite sides	65
climbing plants	65
whole subject	64
west indies	64
posterior cirri	64
two leaves	63
charles lyell	63
right angles	63
young man	63
may conclude	63
one instance	63
second cirrus	62
last chapter	62
one hundred	62
quite agree	62
let us	62
malay archipelago	62
one case	61
general appearance	61
natural science	61
will now	61
many generations	61
adductor muscle	61
strongly marked	61
shall hereafter	61
hundred feet	61
pretty well	60
outer tentacles	60
rudimentary organs	60
dear old	60
never saw	60
basal segments	59
much larger	59
animal kingdom	59
many animals	59
male birds	59
will find	59
early period	59
hundred miles	59
curious case	58
one point	58
higher animals	58
opposite side	58
mental powers	58
salt water	58
alpine plants	58
scientific men	57
five years	57
will think	57
twenty years	57
four days	57
different races	57
well developed	57
parallel roads	57
holds good	57
reproductive system	57
many parts	56
filamentary appendages	55
vocal organs	55
three hundred	55
various parts	55
large size	55
anterior ramus	55
hydrochloric acid	55
differ much	55
three times	55
one will	54
galapagos archipelago	54
latter case	54
three posterior	54
lower surface	54
two kinds	54
will say	53
thickly clothed	53
never seen	53
slight degree	53
interesting letter	53
erasmus darwin	53
reproductive organs	53
brightly coloured	53
close together	52
thirty minims	52
whole body	52
straight line	52
analogous cases	52
first time	52
unconscious selection	52
four times	52
letter refers	51
ovarian tubes	51
doubtful whether	51
much time	51
old man	51
little doubt	51
one time	51
per cent	51
will never	51
nearly equal	50
much better	50
granular matter	50
shall presently	50
last letter	50
new conditions	50
cape de	50
many points	50
one great	50
concluding remarks	50
many birds	50
much greater	50
will take	50
like manner	50
may mention	49
general rule	49
numerical proportion	49
following extract	49
first sight	49
taken place	49
much surprised	49
social instincts	48
gastric juice	48
cape horn	48
jenner weir	48
slightly different	48
much longer	48
see mr	48
professor henslow	48
one specimen	48
many times	48
long letter	48
much difficulty	48
much trouble	47
closely related	47
analogous facts	47
distinct races	47
geological observations	47
quite distinct	47
remarkable fact	46
adult male	46
now see	46
two men	46
little time	46
may perhaps	46
shall never	46
north wales	46
nearly similar	46
may feel	46
return home	45
nitrogenous matter	45
slight differences	45
six leaves	45
new characters	45
will probably	45
well adapted	45
immature plumage	45
fritz muller	45
nervous system	45
will write	45
old age	45
intermediate forms	45
following passage	45
southern hemisphere	45
well inflected	45
thirty years	45
never heard	45
good many	45
fresh water	45
early age	45
several cases	45
short distance	44
may possibly	44
south africa	44
natural conditions	44
much interest	44
basal segment	44
canine teeth	44
three weeks	43
run wild	43
several generations	43
breeding season	43
darwin wrote	43
santa cruz	43
two hundred	43
hundred yards	43
one man	43
sexes differ	43
takes place	43
sir john	43
far distant	43
different islands	43
great interest	43
present time	42
vegetable kingdom	42
many ways	42
every word	42
closely resemble	42
different conditions	42
well worth	42
great difficulty	42
much pleasure	42
one third	42
posterior ramus	42
edition vi	42
first place	42
civilised nations	42
south wales	42
banda oriental	41
old world	41
quite new	41
present state	41
distilled water	41
much struck	41
physical conditions	41
just finished	41
certain characters	41
one occasion	41
days ago	41
one end	41
north american	41
ten years	41
book will	41
great pleasure	41
one single	41
certain species	41
posterior pair	41
small size	41
little way	40
scarcely possible	40
great deal	40
upper end	40
various kinds	40
will go	40
third edition	40
successive variations	40
dear fox	40
representative species	40
strongly inflected	40
another species	40
vast number	40
hereafter see	40
dear gray	40
become extinct	40
argus pheasant	40
latitude degrees	40
early progenitors	39
slightly concave	39
long series	39
highly developed	39
female birds	39
early part	39
geoffroy st	39
great britain	39
two sides	39
glandular hairs	39
oceanic islands	39
almost certainly	39
olfactory orifices	39
brilliantly coloured	39
sexual elements	39
become inflected	39
latter part	39
take place	39
dear henslow	38
curious fact	38
continued selection	38
rio de	38
presently see	38
ascertain whether	38
many others	38
insectivorous plants	38
three months	38
miles distant	38
mental faculties	38
fully developed	38
hold good	38
sex alone	38
two sets	38
became inflected	38
john lubbock	37
hard work	37
ten days	37
complemental male	37
closely similar	37
whole case	37
shall ever	37
galapagos islands	37
long spines	37
successive generations	37
professor owen	37
aggregated masses	37
erratic boulders	37
took place	37
important part	36
history review	36
strong solution	36
two large	36
individual differences	36
differ greatly	36
young specimens	36
will soon	36
volcanic rocks	36
southern africa	36
cold water	36
five days	36
wild cattle	36
slight changes	36
whole country	36
many plants	36
hardly know	36
either sex	36
two great	36
inch long	36
great difference	36
five times	35
great advantage	35
species may	35
copley medal	35
domestic productions	35
good evidence	35
carinal margin	35
years since	35
good reason	35
four years	35
well remember	35
less degree	35
natural system	35
kind letter	35
large extent	35
thickly covered	35
moral sense	35
great number	35
many respects	35
acid secretion	35
new south	35
will come	35
presidential address	35
high power	34
just read	34
thank god	34
part ii	34
rudimentary condition	34
one else	34
second part	34
bright green	34
existing species	34
homologous parts	34
whole day	34
dear huxley	34
first appears	34
nd edition	34
complemental males	34
ibla cumingii	34
extremely glad	34
deserves notice	34
singular fact	34
six feet	34
cordial thanks	34
following letters	33
great distance	33
time ago	33
different kinds	33
second pair	33
double flowers	33
first stage	33
five leaves	33
highest degree	33
de janeiro	33
marine animals	33
one line	33
great change	33
royal institution	33
two months	33
doubted whether	33
may well	33
become modified	33
following year	33
see whether	33
every day	33
first appeared	33
botanical work	33
sur les	33
geological record	33
heartily glad	33
every single	32
one knows	32
greater degree	32
sessile cirripedes	32
eight years	32
nothing else	32
drosera rotundifolia	32
great numbers	32
lesser degree	32
will show	32
canary islands	32
occludent segment	32
large numbers	32
will hereafter	32
open sea	32
herbert spencer	32
deeply interested	32
beagle channel	32
last night	32
moor park	32
hardly ever	32
just received	31
opposite sex	31
two upper	31
almost certain	31
late years	31
almost invariably	31
quadrifid processes	31
similar manner	31
present chapter	31
whole surface	31
every case	31
gallus bankiva	31
et seq	31
another leaf	31
seems probable	31
two segments	31
long period	31
hardly possible	31
god knows	31
old days	31
general rosas	31
arctic regions	31
boiling water	30
without much	30
just like	30
future chapter	30
one parent	30
days afterwards	30
coral islands	30
little masses	30
male sex	30
inner surface	30
shall find	30
two varieties	30
native country	30
soon became	30
purple fluid	30
peloric flowers	30
similar cases	30
little book	30
pall mall	30
must think	30
seven years	30
great classes	30
one form	30
several days	30
one must	30
domestic varieties	30
now living	30
causing inflection	29
four hours	29
far less	29
tentacles became	29
basal articulation	29
must believe	29
isidore geoffroy	29
marginal tentacles	29
much good	29
female births	29
trimorphic plants	29
two small	29
fully re	29
male element	29
must confess	29
first appear	29
single species	29
two others	29
nearly straight	29
will read	29
two following	29
des sciences	29
volume iii	29
sandwich islands	29
another occasion	29
carefully examined	29
much elongated	29
weak solution	29
particularly glad	29
poor dear	29
later years	29
certain degree	29
francis darwin	29
rather large	29
female organs	29
chonos archipelago	28
slightly inflected	28
protoplasm within	28
des sc	28
ten thousand	28
port famine	28
young birds	28
sir william	28
many places	28
wholly different	28
will try	28
definite action	28
young men	28
facts given	28
great length	28
second time	28
whilst young	28
different countries	28
perpetual snow	28
adult female	28
know nothing	28
will tell	28
may therefore	28
page chapter	28
red colour	28
will perhaps	28
entomological society	28
analogous case	28
upper latera	28
de verd	28
largest specimen	28
five feet	28
josiah wedgwood	28
minute drops	28
several hundred	28
good man	28
evil effects	28
considerable number	28
always thought	28
much smaller	28
months ago	27
ever saw	27
james island	27
will keep	27
march st	27
philosophical society	27
throw light	27
royal medal	27
great work	27
something like	27
scientific work	27
miles long	27
must look	27
certain plants	27
allied forms	27
nitrogenous fluids	27
port desire	27
much injured	27
two feet	27
chapter ii	27
either parent	27
gallinaceous birds	27
may say	27
central chile	27
dorsal tufts	27
anthropomorphous apes	27
front legs	27
will generally	27
corresponding periods	27
see dr	27
mere chance	27
will appear	27
one hand	27
little boy	27
basal end	27
highly remarkable	27
one might	27
inherited effects	27
common descent	27
collecting facts	27
adductor scutorum	27
rather larger	27
considerable length	26
kind note	26
took much	26
better adapted	26
keeling island	26
several varieties	26
bright red	26
extreme degree	26
pure white	26
worth giving	26
adult males	26
american species	26
flowering plants	26
still less	26
two last	26
calcareous matter	26
york minster	26
much doubt	26
rather less	26
highly variable	26
longer time	26
heavy rain	26
strong enough	26
one word	26
different climates	26
every now	26
every respect	26
long intervals	26
robert brown	26
carbonic acid	26
sir andrew	26
several parts	26
first three	26
third day	26
domestic breeds	26
good service	26
closely analogous	26
one small	26
young males	26
intellectual powers	26
common progenitor	26
extraordinary degree	26
two males	26
rapid inflection	26
see letters	26
surrounding conditions	26
whole world	26
supernumerary digits	26
several genera	26
many persons	26
abortive organs	25
last year	25
six weeks	25
will also	25
look forward	25
hardly believe	25
several occasions	25
two genera	25
glacial epoch	25
conchoderma aurita	25
true species	25
lord farrer	25
living creatures	25
entire length	25
specifically distinct	25
charles island	25
scutorum muscle	25
indian archipelago	25
dry land	25
first generation	25
remote period	25
one set	25
dear wallace	25
lower whorl	25
far south	25
new world	25
certain individuals	25
crossed offspring	25
man must	25
rd series	25
exactly like	25
last two	25
years afterwards	25
european plants	25
heterostyled plants	25
new varieties	25
hardly doubt	25
make one	25
one individual	25
chief part	25
latter species	25
long since	25
male offspring	25
seen one	25
ventral surface	25
niata cattle	25
greatly inflected	25
another case	25
luxuriant vegetation	25
four feet	25
general laws	25
fully believe	25
curious account	25
somewhat different	25
young ones	25
large genera	25
central part	25
time since	25
chauncey wright	25
one may	25
thrown away	25
vast numbers	25
given rise	25
careful selection	25
general remarks	25
higher apes	25
slight variations	25
must say	25
geological work	25
look back	24
long hair	24
viscid secretion	24
sixth edition	24
gemmules derived	24
pray believe	24
know well	24
perhaps even	24
long line	24
mental qualities	24
botanic gardens	24
one spot	24
strong tendency	24
many instances	24
underlying corium	24
relative size	24
greatly interested	24
many facts	24
certain birds	24
stridulating organs	24
take care	24
higher degree	24
surrounding tentacles	24
burdon sanderson	24
calcareous scales	24
soon found	24
jemmy button	24
will get	24
good fortune	24
new york	24
upper spines	24
various species	24
new races	24
will publish	24
fossil species	24
considerably inflected	24
spiral vessels	24
scutal margin	24
females alone	24
fertilisation mechanism	24
late mr	24
close relation	24
southern part	24
high importance	24
inches long	24
following cases	24
must suppose	24
large animals	24
nearly three	24
th edition	24
one thing	24
third cirrus	24
observe whether	24
one little	24
far better	24
sir james	24
unnatural conditions	24
male differs	24
glacial action	24
new facts	24
rather longer	24
deeply impressed	24
shortly afterwards	24
almost exclusively	24
minute spines	24
single tentacle	24
whilst others	24
edinburgh review	23
least affected	23
one sense	23
ultimate segment	23
two cases	23
pounds sterling	23
different forms	23
high degree	23
various ways	23
lower segments	23
quite different	23
insular floras	23
son francis	23
small portion	23
either side	23
new mates	23
nowhere else	23
lost characters	23
fight together	23
geological structure	23
basal angle	23
fluid within	23
hind legs	23
sincere thanks	23
give us	23
every way	23
truly obliged	23
fibrous basis	23
common stock	23
several points	23
great oceans	23
two plants	23
fossil bones	23
anything else	23
one male	23
male alone	23
northern chile	23
fine spines	23
northern hemisphere	23
fairly well	23
perfectly fertile	23
may safely	23
certain parts	23
say nothing	23
differ slightly	23
temperate regions	23
one female	23
must write	23
one year	23
highly probable	23
burst forth	23
chapter iii	23
poultry book	23
large part	23
may often	23
greater size	23
letter will	23
young male	23
westminster abbey	23
greatly modified	23
external characters	23
whole party	23
deeply concave	22
double moult	22
truly wonderful	22
many different	22
increased size	22
almost entirely	22
last time	22
main teeth	22
dear darwin	22
fifth edition	22
lower jaw	22
shall soon	22
important element	22
british birds	22
direct line	22
similar facts	22
old ones	22
latter fact	22
domesticated productions	22
rather late	22
ever read	22
male characters	22
just seen	22
tergal margin	22
rio plata	22
much flattened	22
excellent observer	22
long periods	22
second year	22
three feet	22
whole family	22
second volume	22
great kindness	22
favourable conditions	22
will ever	22
surrounding fluid	22
one way	22
two groups	22
weaker solution	22
minute particles	22
whole length	22
professor huxley	22
short paper	22
absolutely necessary	22
time afterwards	22
floating ice	22
might expect	22
several leaves	22
direct evidence	22
several hours	22
extinct species	22
solid rock	22
chapter iv	22
long continued	22
pollicipes mitella	22
vegetable mould	22
read aloud	22
different degrees	22
third cirri	22
great class	22
first two	21
new breed	21
short tentacles	21
worth sending	21
greatly indebted	21
six months	21
european species	21
really think	21
long distance	21
will answer	21
former chapter	21
might easily	21
fifty years	21
every species	21
swiss lake	21
port st	21
probably due	21
mean temperature	21
certain diseases	21
sounds produced	21
earlier age	21
small quantity	21
common salt	21
fully convinced	21
slightly modified	21
black colour	21
three generations	21
widely distributed	21
might perhaps	21
later editions	21
geological survey	21
must admit	21
january st	21
intimately related	21
clearly see	21
already stated	21
main divisions	21
natural means	21
scalpellum vulgare	21
analogous variation	21
brilliant colours	21
certain breeds	21
lord avebury	21
two inches	21
write now	21
female sex	21
different breeds	21
god bless	21
slight inflection	21
first volume	21
lower parts	21
carinal latera	21
four teeth	21
hearty thanks	21
every direction	21
certain amount	21
great changes	21
mingled together	21
close beneath	21
specific forms	21
present subject	21
geological changes	21
equal length	21
methodical selection	21
many individuals	21
nearly half	21
much higher	21
hardly anything	21
historical sketch	21
much shorter	21
quite impossible	21
wild species	21
rather small	21
allied genus	21
primordial valves	21
ninety minims	21
human foetus	21
will first	21
sessile glands	21
lessened fertility	21
proportional numbers	21
equally well	21
rocky mountains	20
must give	20
second species	20
small genera	20
living creature	20
central glands	20
quite understand	20
three thousand	20
whole organisation	20
whole group	20
saw one	20
introduced plants	20
one chief	20
nut trees	20
lower end	20
queen anne	20
nd edit	20
english translation	20
specially modified	20
inferior part	20
brought forward	20
may nd	20
several breeds	20
must thank	20
certain cases	20
must take	20
pure water	20
well know	20
naked eye	20
der natur	20
looking back	20
parallel case	20
almost universal	20
relative position	20
new forms	20
two little	20
next chapter	20
always felt	20
two main	20
without doubt	20
prosper lucas	20
father used	20
selection will	20
fernando noronha	20
differently coloured	20
ponsonby sound	20
great mass	20
voyage de	20
another point	20
thousand years	20
conspicuously coloured	20
highly bullate	20
remarkable circumstance	20
next letter	20
juan fernandez	20
lepas fascicularis	20
naturalised plants	20
two volumes	20
verd islands	20
good effects	20
transverse rows	20
oesophageal ganglion	20
viscid fluid	20
often seen	20
extremely minute	20
long kept	20
one good	20
foregoing cases	20
sometimes even	20
must also	20
give rise	20
told us	20
john scott	20
will always	20
distinct genera	20
many miles	20
east indian	20
carried away	20
leaves immersed	20
last note	20
similar conditions	20
far greater	20
three pair	20
ever since	20
gave us	20
interesting fact	20
sir thomas	20
even one	20
two individuals	20
read anything	20
will admit	20
open ocean	20
primordial utricles	20
ray society	20
increased use	20
great wave	20
six days	20
must remember	20
may st	20
corresponding member	20
afterwards published	20
several papers	20
great height	20
conspicuous colours	20
albemarle island	20
different manner	20
lower form	20
case seems	20
one variety	20
became well	20
one alone	20
later date	20
association meeting	20
late period	20
closely resembles	20
rostral latera	19
december st	19
inter se	19
deep water	19
well fitted	19
usual manner	19
volcanic phenomena	19
almost equally	19
also much	19
scientific man	19
remember well	19
might possibly	19
first thought	19
soon afterwards	19
well established	19
least one	19
indian ocean	19
obituary notice	19
peculiar species	19
completely dissolved	19
another part	19
latter cases	19
outer integument	19
quarterly review	19
soluble nitrogenous	19
former times	19
will call	19
sufficient evidence	19
poor old	19
chapter xiii	19
level plain	19
distinct individual	19
andrew smith	19
fine bristles	19
often differ	19
different individuals	19
though perhaps	19
striking cases	19
several glands	19
various facts	19
last stage	19
characters proper	19
bluntly pointed	19
strong inflection	19
lauder brunton	19
ibla quadrivalvis	19
nearly uniform	19
northern parts	19
one inch	19
long bristles	19
protective colouring	19
submarginal tentacles	19
hugh falconer	19
new series	19
much secretion	19
still think	19
parent form	19
anne street	19
will become	19
will ultimately	19
single one	19
already remarked	19
correlated variation	19
long tail	19
come across	19
close similarity	19
two hours	19
sincere respect	19
bad weather	19
crossed plants	19
connected together	19
lower country	19
great size	19
good instance	19
present essay	19
different colours	19
may serve	19
fully discussed	19
subsequent action	19
interesting facts	19
greatly magnified	19
scarcely ever	19
future time	19
much weight	19
slightly hollowed	19
two countries	19
one evening	19
july st	19
inner side	19
full account	19
shall immediately	19
one morning	19
feet deep	19
two races	19
now know	19
long walks	19
pedunculated cirripedes	19
male organs	19
well acquainted	19
building corals	18
professor ehrenberg	18
western coast	18
must therefore	18
peculiar manner	18
tropical plants	18
two points	18
say whether	18
polish fowls	18
strong taste	18
doubts whether	18
continental extension	18
following case	18
extremely small	18
succeeding generations	18
frozen snow	18
will tend	18
blended together	18
distinct individuals	18
french edition	18
differ considerably	18
utricularia neglecta	18
lower mandible	18
ran away	18
whole line	18
chatham island	18
twenty miles	18
four species	18
shall go	18
rather thick	18
excessively minute	18
two latter	18
less important	18
next summer	18
fourth edition	18
now found	18
forty years	18
various animals	18
francis galton	18
three forms	18
bred animals	18
great care	18
first chapter	18
single gland	18
every side	18
totally different	18
new phil	18
german edition	18
four miles	18
two letters	18
extremely much	18
foreign pollen	18
sixty years	18
volume iv	18
marked manner	18
chapter vii	18
great extent	18
ten miles	18
average number	18
species will	18
improved breeds	18
six hundred	18
weak hydrochloric	18
society journal	18
infinitely numerous	18
captain cook	18
large proportion	18
saturday review	18
never found	18
botanic garden	18
three miles	18
occludent margins	18
chapter vi	18
great service	18
first note	18
may appear	18
two classes	18
differs much	18
miles northward	18
recent period	18
may rely	18
gower street	18
ordinary cases	18
new character	18
wild horses	18
sensitive filaments	18
special purpose	18
hybrid offspring	18
shall publish	18
may suppose	18
porto praya	18
july nd	18
almost exactly	18
almost identical	18
captain king	18
present work	18
one direction	18
never occurred	18
months old	18
five minutes	18
plants raised	18
almost sure	18
nearly parallel	18
one island	18
metamorphic schists	18
public opinion	18
eastern coast	18
also seen	18
central parts	18
arctic plants	18
certain forms	18
well remarked	18
somewhat inflected	18
following extracts	18
greatest interest	18
distinct plant	18
now existing	18
peaty soil	18
entirely agree	18
general description	18
corporeal structure	18
wide ranges	18
pour forth	18
green colour	18
different nature	18
general public	18
large quadrupeds	17
edition page	17
changed habits	17
feel quite	17
carefully observed	17
civilised people	17
whole time	17
often spoke	17
continental extensions	17
another question	17
crossed species	17
quite clear	17
unusually large	17
often said	17
winter plumage	17
lepas anatifera	17
rapid movement	17
will mention	17
great power	17
one plant	17
basal part	17
fully admit	17
important point	17
knew nothing	17
lower figure	17
volume vii	17
certain male	17
slightly protuberant	17
fifteen years	17
one important	17
every kind	17
best adapted	17
weak solutions	17
october st	17
high spirits	17
must always	17
brought home	17
blue sky	17
three great	17
pulpy matter	17
much indebted	17
latent tendency	17
drive away	17
may think	17
man may	17
found one	17
natural size	17
human embryo	17
shorter time	17
coral formations	17
sincerely hope	17
scarlet fever	17
ever seen	17
bright yellow	17
often found	17
subject will	17
work will	17
two thousand	17
increased secretion	17
marlborough street	17
since leaving	17
made many	17
larger number	17
real good	17
sixth pair	17
almost everything	17
thirty miles	17
first acquired	17
present species	17
little distance	17
three teeth	17
species theory	17
single point	17
will understand	17
tres montes	17
good work	17
may remark	17
fossil plants	17
posterior rami	17
two different	17
whole scene	17
common parent	17
shall make	17
many naturalists	17
one large	17
good observer	17
even within	17
characters derived	17
pacific ocean	17
condyloid foramen	17
unusual degree	17
question whether	17
inflected tentacles	17
become developed	17
ever heard	17
royal commission	17
small amount	17
must try	17
perfectly adapted	17
recent elevation	17
five hundred	17
doubly serrated	17
united together	17
cerebral hemispheres	17
plants growing	17
considerable time	17
st edition	17
many thousand	17
extreme point	17
two long	17
strongly pronounced	17
extraordinary manner	17
often become	17
wild state	17
another letter	17
close resemblance	17
now known	17
elastic tissue	17
succeeding days	17
eastern side	17
adult females	17
professor judd	17
moderately long	17
many things	17
best known	17
sexual character	17
hermann muller	17
whole question	17
little less	17
poured forth	17
found near	17
young children	17
different periods	17
scarcely anything	17
von paraguay	17
effect produced	17
absolutely nothing	17
tentacles closely	16
next year	16
distinctive characters	16
general resemblance	16
lower classes	16
growing surface	16
individual animals	16
plainly see	16
never thought	16
different appearance	16
wonder whether	16
striking instance	16
now seen	16
much care	16
three segments	16
must make	16
moral faculties	16
rather wide	16
chapter viii	16
become much	16
run away	16
social animals	16
south sea	16
personal appearance	16
living things	16
short account	16
viewed internally	16
general form	16
now given	16
de quatrefages	16
spherical masses	16
general character	16
degrees south	16
stronger solution	16
orchid book	16
often used	16
become adapted	16
another instance	16
good enough	16
similarly affected	16
secondary wing	16
also informs	16
slightly curved	16
must tell	16
great importance	16
widely distinct	16
evolutionary views	16
even still	16
foregoing facts	16
lake theory	16
pages et	16
whole life	16
done good	16
become aggregated	16
basal calcareous	16
curious point	16
one common	16
british review	16
unknown causes	16
lower orders	16
lady lyell	16
comparative anatomy	16
also mr	16
now turn	16
will care	16
reciprocal crosses	16
give one	16
pretty sure	16
kindly sent	16
may give	16
probable view	16
remain inflected	16
indirect evidence	16
longer axis	16
different ways	16
general law	16
two cement	16
fossil shells	16
captured insects	16
may become	16
marked sexual	16
victor carus	16
lower one	16
cellular tissue	16
two instances	16
des anomalies	16
mall gazette	16
whole capitulum	16
much wish	16
one race	16
nearly twice	16
brighter coloured	16
long years	16
future work	16
used often	16
organic world	16
posterior end	16
anterior end	16
directed towards	16
beagle sailed	16
greatest number	16
upper segments	16
joint paper	16
lower ones	16
free intercrossing	16
among savages	16
good heavens	16
continued use	16
much stronger	16
several kinds	16
spare time	16
former period	16
intellectual faculties	16
young cirripede	16
widest part	16
may now	16
northern patagonia	16
geographical range	16
prehensile organs	16
better chance	16
individual species	16
noise made	16
wild dogs	16
eight days	16
almost completely	16
open plains	16
vary much	16
many new	16
must know	16
now give	16
american continent	16
worth publishing	16
several facts	16
almost wholly	16
whole island	16
every man	16
great earthquake	16
following note	16
never forget	16
upper parts	16
well aware	16
minute drop	16
serrated spines	16
rather short	16
feet thick	16
hundred thousand	16
several small	16
another plant	16
real pleasure	16
rare cases	16
american indians	16
generative system	16
increased fertility	16
one fourth	16
throughout life	16
bifid processes	16
strongly inherited	16
fossil remains	16
early stage	16
will turn	15
four pairs	15
imperfectly calcified	15
whole animal	15
digestive power	15
cultivated land	15
male animals	15
various causes	15
first step	15
upper ends	15
interesting paper	15
coloured birds	15
whole upper	15
like animal	15
generally admitted	15
earlier period	15
long hairs	15
largely developed	15
last twenty	15
basal rim	15
somewhat similar	15
professor sedgwick	15
knows whether	15
living animals	15
early embryonic	15
full size	15
three inches	15
extremely kind	15
special weapons	15
worth anything	15
last ten	15
uppermost part	15
german translation	15
reasoning powers	15
marked races	15
native land	15
usual structure	15
find time	15
cytisus adami	15
naked skin	15
artificial selection	15
longitudinal axis	15
become attached	15
yellow membrane	15
dark brown	15
certain varieties	15
royal gardens	15
evidently dead	15
first plumage	15
tell us	15
wonderful fact	15
collecting beetles	15
week ago	15
allied genera	15
heaven knows	15
natural classification	15
april rd	15
whole structure	15
dark blue	15
following facts	15
afterwards became	15
extremely difficult	15
upper figure	15
recent species	15
elie de	15
edward forbes	15
november rd	15
third species	15
angular fragments	15
two occasions	15
early development	15
acquired characters	15
smaller size	15
least use	15
little longer	15
will prove	15
short space	15
two thirds	15
beautifully adapted	15
remarkable feature	15
embryonic period	15
almost universally	15
additional hrs	15
feet long	15
felt sure	15
nine days	15
second leaf	15
two places	15
irregular flowers	15
surrounding country	15
every year	15
man will	15
southern parts	15
several races	15
male mammals	15
south side	15
basal margins	15
porto santo	15
little bird	15
extremely curious	15
new zealanders	15
san pedro	15
following day	15
read mr	15
upper surfaces	15
placed far	15
paper read	15
simple fact	15
margin slightly	15
shall feel	15
specific gravity	15
effects produced	15
many varieties	15
may sometimes	15
internal structure	15
utricularia montana	15
forget whether	15
white man	15
taken advantage	15
therefore conclude	15
hardly fail	15
lofty mountains	15
least doubt	15
please return	15
thirteen species	15
six species	15
unknown cause	15
external appearance	15
little power	15
often heard	15
running water	15
quarterly journal	15
first day	15
many specimens	15
cut open	15
five teeth	15
third leaf	15
full force	15
short spines	15
already seen	15
will occasionally	15
moral qualities	15
ever lived	15
particularly obliged	15
high land	15
dark red	15
civilised countries	15
illegitimate unions	15
greatest happiness	15
american geology	15
tertiary period	15
almost impossible	15
remote epoch	15
rare exceptions	15
will forgive	15
interesting work	15
saw many	15
may also	15
coloured varieties	15
first appearance	15
large party	15
many curious	15
certain animals	15
always seemed	15
common form	15
former state	15
species work	15
simple microscope	15
large scale	15
organised beings	15
brown colour	15
small degree	15
individual animal	15
many hours	15
least two	15
never read	15
eight feet	15
wild turkey	15
take advantage	15
early youth	15
greatly increased	15
wide difference	15
four months	15
one period	15
must conclude	15
et gaimard	15
passed away	15
chapter ix	15
natural state	15
various breeds	15
will excuse	15
instrumental music	15
several others	15
curious facts	15
crossed races	15
peculiar structure	15
way connected	15
june nd	15
must now	15
distinct breeds	15
cultivated ground	15
ever afterwards	15
male bird	15
extreme marginal	15
quoy et	15
chief cause	15
mountain chains	15
will look	15
fully agree	15
different habits	14
dark purple	14
yards wide	14
much inflection	14
ten times	14
many races	14
great amount	14
great man	14
molar teeth	14
american review	14
sur la	14
turning round	14
tropical countries	14
kind friend	14
wild duck	14
immediately see	14
latter point	14
dear father	14
appear probable	14
first week	14
zealand flora	14
whatever may	14
primeval man	14
remarkable manner	14
small teeth	14
calcareous cup	14
purple colour	14
water mark	14
coarse grass	14
general conclusions	14
intermediate condition	14
ill health	14
geological evidence	14
will just	14
certain number	14
must often	14
work done	14
species must	14
now consider	14
see one	14
sexual relations	14
anything like	14
great beds	14
british plants	14
nearly two	14
will interest	14
short intervals	14
attractive males	14
civilised races	14
long run	14
suffer much	14
never dreamed	14
astonishing number	14
secretion round	14
moderately inflected	14
heartily wish	14
small islands	14
many insects	14
produced young	14
much astonished	14
good one	14
leaving england	14
now read	14
directly opposite	14
twenty feet	14
wild parent	14
viscid matter	14
much disappointed	14
general aspect	14
broken land	14
distinct plants	14
portillo pass	14
passage occurs	14
calcified scales	14
cambridge life	14
ever knew	14
great marlborough	14
eminently liable	14
near cape	14
remarkable case	14
different groups	14
see volume	14
male fishes	14
high authority	14
intermediate varieties	14
good chance	14
folio pages	14
pray forgive	14
good luck	14
highly protuberant	14
four inches	14
good cause	14
right hand	14
species belonging	14
important subject	14
may take	14
primary wing	14
best plan	14
one long	14
first origin	14
outer surface	14
good remarks	14
quite extraordinary	14
single pair	14
various authors	14
philosophical transactions	14
uniform conditions	14
four hundred	14
considerable numbers	14
constitutional peculiarities	14
extremely slight	14
left side	14
french translation	14
selection may	14
cottage gardener	14
les plis	14
became acquainted	14
beagle anchored	14
foregoing species	14
considerable size	14
poor fellow	14
might become	14
must remain	14
much pains	14
central line	14
naturalists will	14
repeated touches	14
greater depth	14
just mention	14
cells beneath	14
will pretend	14
many male	14
will produce	14
make use	14
will allow	14
paramount importance	14
darwin visits	14
punta alta	14
shall meet	14
new guinea	14
one place	14
extremely improbable	14
wide range	14
great surprise	14
lower surfaces	14
early maturity	14
new matter	14
certain kinds	14
long enough	14
old woman	14
much inflected	14
erratic blocks	14
every reason	14
will consider	14
century ago	14
extremely variable	14
saw several	14
distant parts	14
letters refer	14
though much	14
latent characters	14
sternal surface	14
yellow fever	14
every plant	14
now look	14
letter written	14
red sea	14
various races	14
will therefore	14
new views	14
utricularia vulgaris	14
rather broad	14
free crossing	14
conchoderma virgata	14
particularly struck	14
final cause	14
two parts	14
new genus	14
short period	14
quartz rock	14
many small	14
long course	14
several places	14
will add	14
affectionate friend	14
sexual peculiarities	14
now placed	14
alimentary canal	14
often say	14
encircling barrier	14
well marked	14
median latera	14
sterile hybrids	14
os coccyx	14
one fifth	14
former case	14
many genera	14
captain sulivan	14
constitutional differences	14
one main	14
first developed	14
upward growth	14
rostral angle	14
concealed nests	14
former letter	14
wide extent	14
one district	14
closely resembled	14
may probably	14
wrong side	14
milne edwards	13
one sentence	13
another man	13
six pair	13
october nd	13
one doubts	13
cause inflection	13
year ago	13
day will	13
internal view	13
two lobes	13
william darwin	13
thomas farrer	13
may occur	13
feel inclined	13
striking manner	13
simple explanation	13
rain falls	13
see forms	13
came across	13
basal portion	13
intimately connected	13
little value	13
almost rudimentary	13
mental attributes	13
short stamens	13
papilionaceous flowers	13
much impressed	13
pure species	13
however much	13
much attention	13
blue mountains	13
will serve	13
every tentacle	13
introductory essay	13
still greater	13
will hardly	13
curious little	13
masculine characters	13
compound eyes	13
seven days	13
blend together	13
six years	13
every animal	13
south african	13
mutually sterile	13
geological hammer	13
single spine	13
small doses	13
recent shells	13
highly improbable	13
spontaneous generation	13
quite forgotten	13
humid climate	13
happiness principle	13
curious instance	13
must attribute	13
many friends	13
able men	13
several great	13
pinguicula vulgaris	13
thousand pounds	13
letter addressed	13
last edition	13
blue colour	13
lowly organised	13
nearly every	13
earlier chapters	13
obscurely coloured	13
autobiographical chapter	13
dorsal surface	13
original work	13
curved inwards	13
barrier reefs	13
common species	13
honorary member	13
open air	13
ask whether	13
always looked	13
exactly similar	13
cases may	13
still earlier	13
inner margin	13
sentient beings	13
already mentioned	13
tome page	13
feral rabbits	13
strongly inclined	13
old women	13
equal number	13
wholly due	13
careful examination	13
time required	13
long thought	13
much rain	13
bright tints	13
will account	13
think fit	13
thiselton dyer	13
important fact	13
whole theory	13
good success	13
geological history	13
now exist	13
though still	13
five miles	13
glands secrete	13
felt much	13
two lots	13
curious cases	13
geological succession	13
spiritual agencies	13
certain races	13
sometimes differ	13
recently published	13
natatory legs	13
highly poisonous	13
sir wyville	13
great principle	13
present letter	13
gradually acquired	13
several weeks	13
present volume	13
fair share	13
first discovered	13
internal basal	13
formerly thought	13
arid plains	13
much affected	13
tropical scenery	13
feel assured	13
shaped feathers	13
now generally	13
interesting discussion	13
la soc	13
cryptogamic plants	13
man alone	13
sexes resemble	13
antarctic islands	13
hear whether	13
shallow water	13
exceptional cases	13
long voyage	13
seven leaves	13
often occurs	13
little trouble	13
good illustration	13
volume xix	13
human body	13
greatly reduced	13
upper great	13
red feathers	13
much amused	13
highest point	13
san lorenzo	13
spanish cock	13
atlantic ocean	13
great masses	13
less closely	13
max muller	13
last week	13
brackish water	13
occasional cross	13
last proof	13
immediate neighbourhood	13
kind enough	13
von baer	13
pelagic animals	13
several instances	13
direct effect	13
late sir	13
school life	13
entire absence	13
tending towards	13
future day	13
young animals	13
april st	13
time will	13
cabbage seeds	13
propionic acid	13
one exception	13
show us	13
large black	13
found two	13
nearest allies	13
common sense	13
nearly perfect	13
good men	13
different shape	13
analogous manner	13
peculiar form	13
large sale	13
botofogo bay	13
saw two	13
ten minutes	13
individual plants	13
species differ	13
crowded together	13
considerable extent	13
tentacles remain	13
may believe	13
measured one	13
less well	13
great good	13
great effect	13
loose sand	13
similar circumstances	13
old trees	13
might well	13
nothing whatever	13
vegetable matter	13
much truth	13
tail feathers	13
later period	13
much enjoyed	13
man selects	13
exciting cause	13
turned round	13
never expected	13
great value	13
opposite end	13
constitutional vigour	13
november st	13
soon become	13
continued close	13
separately created	13
every island	13
quite independent	13
areolar tissue	13
second tooth	13
low archipelago	13
new country	13
dans les	13
great honour	13
small insects	13
lower lip	13
strongly developed	13
corresponding period	13
much slower	13
closely resembling	13
roast meat	13
great men	13
know something	13
extremely interesting	13
immensely remote	13
several males	13
interesting case	13
crossed varieties	13
already said	13
now finished	13
great rivers	13
highly important	13
extremely common	13
early progenitor	13
read march	13
social instinct	13
rendered insensible	13
corresponding leaves	13
longer period	13
worth reading	13
ancient times	13
butyric acid	13
domesticated birds	13
beautifully coloured	13
intermediate character	13
collected together	13
bad health	13
two pair	13
terrestrial species	13
bending place	13
larger ones	13
many experiments	13
english edition	13
reflex action	13
multiple origin	13
highly injurious	13
still higher	13
quite naked	13
temperate forms	13
white sand	13
must refer	13
many little	12
robert waring	12
upper margin	12
intermediate spines	12
lower segment	12
pretty good	12
probosciformed penis	12
interesting account	12
indian corn	12
intertropical regions	12
coloured pink	12
black mark	12
part iii	12
five species	12
female butterflies	12
modified descendants	12
caustic potash	12
become quite	12
outer coast	12
large quantity	12
one kind	12
dimorphic plants	12
must forgive	12
much stress	12
single plant	12
several respects	12
litmus paper	12
basal point	12
next two	12
volcanic action	12
little difference	12
bend inwards	12
ever made	12
true one	12