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CIHM/ICMH
Microfiche
Series.
CIHM/ICIVIH
Collection de
microfiches.
Canadian Institute for Historical Microreproductions / Institut Canadian de microreproductions historiquas
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Technical and Bibliographic Notes/Notes techniques et bibliographiques
The Institute has attempted to obtain the best
original copy available for filming. Features of this
copy which may be bibliographically unique,
which may alter any of the images in the
reproduction, or which may significantly change
the usual method of filming, are checked below.
□ Coloured covers/
Couvertura de coulaur
D
Covers damaged/
Couverture endommagie
I ! Couverture restaurie et/ou pelliculie
D
n
D
D
D
Covers re stored and/or laminated/
Couverture restaurii
Cover titli -lissing/
Le titrt lit^ ..ouve
Colourea maps/
I I Le titrt -ii- ..ouverture manque
Colourea maps/
Cartes giographiques en couleur
Coloured ink (i.e. other than blue or black)/
Encre de couleur (i.e. autre que bleue ou noire)
Coloured plates and/or illustrations/
Planches et/ou illustrations en couleur
Bound with other material/
ReliA avec d'autres documents
Tight binding may cause shadows or difltortion
along interior margin/
Lareli'tre serree peut causer de I'ombre ou de la
distorsion le long da la marge intiriaure
Blank leaves added during restoration may
appear within the text. Whenever possible, these
have been omitted from filming/
II se peut que certaines pages jianches ajouties
lors d'une restauration apparaissent dans le texta,
mais, lorsque cela 6tait possible, ces pages n'ont
pas M filmies.
The(
toth
L'Institut a microfilm^ le meilleur exemplaire
qu'il lui a ixi possible de se procurer. Les details
de cet exemplaire qui sont peut-^tre uniques du
point de vue bibliographique, qui peuvent modifier
une image reproduite, ou qui peuvent exiger une
modification dans la m^thode normale de filmage
sont indiqute ci-dessous.
□ Coloured pages/
Pages de couleur
□ Pagtt.s damaged/
Pa^ !! endommagies
r~~| Pages restored and/or laminated/
D
D
Pages restauries et/ou pelliculias
Pages discoloured, stained or foxed/
Pages decolordes, tachetees ou piquees
The
posa
of t^
filmi
Orig
begi
the I
sion
othe
first
sion
Drill
nn Pages detached/
Pages d^tachees
Showthrough/
Transparence
Quality of prir
Qualiti inigale de ('impression
Includes supplementary materii
Comprend du materiel suppl^mentaire
ry] Showthrough/
n~| Quality of print varies/
n~1 Includes supplementary material/
Only edition available/
Seuie Edition disponible
Pages wholly or pi^rtially obscured by errata
slips, tissues, etc., have been refilmad to
ensure the best possible image/
Les pages totalement ou partiellement
Qbscurcies par un feuillet d'errata. une pelure,
etc., cnt iti fiimies A nouveau de facon A
obtenir la meilleure image possible.
The
she!
TINI
whi(
Mar
diffi
enti
begi
righ
reqi
met
Additional comments:/
Commentaires supplAmentaires;
[Printed ephemera] 1 sheet (verso blank)
This item is filmed at the reduction ratio checked below/
Ce document est filme au taux de rMuction indiquA ci-dessous.
10X 14X 18X 22X
26X
30X
/
12X
16X
aox
24X
28X
32X
The copy filmed here has been reproduced thank*
to the generosity of:
Library of the Public
Archives of Canada
L'exemplaire filmi fut reproduit grice & la
g6n4ro8itA de:
La bibliothdque des Archives
publiques du Canada
The images appearing hore are the best quality
possible considoring the condition and legibility
of the original copy and in keeping with the
filming contract specifications.
Original copies in printed paper covers are filmed
beginning with the front cover and ending on
the last page with a printed or illustrated impres-
sion, or the back cover when appropriate. All
other original copies are filmed beginning on the
first page with i printed or illustrated impres-
sion, and tending on the last page with a printed
or illustrated impression.
The last recorded frame on each microfiche
shall contain the symbol — »> (meaning "CON-
TINUED"), or the symbol V (meaning "END"),
whichever applies.
iVIaps, plates, charts, etc., may be filmed at
different reduction ratios. Those too large to be
entirely included in one exposure are filmed
beginning in the upper left hand corner, left to
right and top to bottom, as many frames as
required. The following diagram* illustrate the
method:
Las images suivantes ont 6t4 reproduites avec le
plus grand soin, compte tenu de la condition at
de la netteti de l'exemplaire film6, et en
conformity avec les conditions du contrat de
filmage.
Les exemplaires originaux dont la couverture en
papier est imprimie sont filmis en commenpant
par le premier plat et en terminant soit par la
derniire page qui comporte une empreinte
d'impression ou d'illustration, soit par le second
plat, selon le cas. Tous les autros exemplaires
originaux sont film6s en commenpant par la
premiere page qui comporte une empreinte
d'impression ou d'illustration et en terminant par
la derniire page qui comporte une telle
empreinte.
Un des symboiies suivants apparattra sur la
derniAre image de cheque microfiche, selon le
cas: le symbols -^ signifie 'A SUIVRE ", le
symbols V signifie "FIN".
Les cartes, planches, tableaux, etc., peuvent dtre
filmAs i des taux de reduction diff6rents.
Lorsque le document est trop grand pour Atre
reproduit en un seul cliche, il est film6 d partir
de I'angie sup6rieur gauche, de gauche d droite,
et de haut an ^ns, en prenant le nombre
d'images necessaira. Les diagrammes suivants
illustrent la mithode.
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i^mericaii I^ailwa^ Wja^tiei' W[Echanic^' j^^^ociatioij,
OFFICE'OF THE SECRETARY.
J. II. SETCHELL,
Secretiirv.
J. DAVIS BARNETT.
President.
Dunkirk, Nov. 20th, 1885.
The Driver IJrake Coininitt(ie reijuest an early reply to the following
(lueries, viz..
1 — Are there any circumstances under which you would recommend the application of driver v v.
brakes, and if on all classes of engines, viz.: passenger, freight and switching ?^a-- 'd^L^-Lix/Lu.ux^
2_What are the best substances, the best shape, and best size for brake-blocks to be u^^^a^.^^ X^e^^
on steel tyres ? /^A-d-y^^i^-i^'^^
3 — Does the application of driver brakes lessen engine mileage between each tyre turning,
etc? If so, to what extent? /^^^f-^ /ic2Z2^
4 — Does their application lessen mileage benveen repairs that can be got out of journals,
axle boxes, horn blocks and wedges, side rod brasses, etc.? 'l~\^/yu^ IcZtte^
5 — Is any injury done to engine o^' side rods by applying brake blocksf on one side only, and
between wheels, (wedge type,) thus forcing the axles further apart, or is there a practi-
cal advantage in gripping each wheel with brake blocks on both sides, (compression
type,)?/^ _
— Is it advantagcyus tflcouple (Tiivci, ucii^v^i «iiu i;.«iii v^^^^^^^^^ ..^ ^.^^^^ ^..^ ^.- -. / 1—^./)' j ' /
will apply the whole ? ':rfAjy.i^ci. /^.^^ /^ J h-i^y^tyH i>U-^uL ^>'v^i^V-^^^'^'^^^-'-^'^
-Which is the best position for brake blocks so as to give the greu ■ A power and least a^;;^^^'^ V^
interference with the elastic action of the main springs? ^ Ic^/^Qa, O^-l/^u^ ^K^ ^^.^„^J^ ^"^^^x
8— What percentage of the weight of the drivers is it judicious to utilize for brake resist- ^ '
ance in view of the train breaking loose, and the possibility of the front (by the auto-
matic application of the brake,) being brought to a stop earlier than the rear portion,
thus resulting in a rear pitch-in ? ^,i^^_^^/^i^ ^^ h^i^A^/^t. Jh^v-^, .&rH^Axyf^( A^-^
9_Do you recommend the application otst^am' or other form of power-brake /on Jnvers CLaa/o i'->^^~^t:'
when the train is not provided with any form of continuous brake, — or, in other words, — l^CeL/.^^,
is tliere any element of danger in having a powerful brake resistance at the front end of
the train? ^ l^o^^-^af J^r^M^^}' ItJ^^U
10 — As there are several ways of applying brakes through an electric current, should the
electric wire be so connected with the source of power that the touching of a button or
key by train conductor, would give him the opportunity of applying the brakes on the
driving and tender wheels as well on the car wheels ?
y/^-^rC Cr-i^ /7al
7/.
6^1 ^^y)K^'?^
Do not cfinfine your answers to the above leading questions, but in ad-
dition kindly give any experience, information, statistics or opinions you
may have on tlie general subject of tlie application of driver brakes to loco-
motives, [either for or against ]
On behalf of Committee.
Replies to be addressed to
J. DAVIS HARNETT,
FORT HOPE,
ONTARIO, CANADA.
H. A. WHITNEY, Inter-Colonial R'y.
J. DAVIS BARNETT, Grand Trunk R'y.
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