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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 mary frames as required. The following diagrams illustrate the method: Les cartes, planches, tableaux, etc., peuvent dtre film^s it des taux de reduction diff^rents. Lorsque le document est trop grand pour dtre reproduit en un seul cltch6, il est filmd A partir de I'angle sup6rieur gauche, de gauche d droite, et de haut en bas, en prenant le nombre d'images ndcess^irc. Les diagrammes suivants illustrent la mithode. Bia ilure, a 1 2X 1 2 3 1 2 3 4 5 6 I #Sr^- w \ oSLSj E IP O 12/ T>o OF A MEETING OF THE MONTREAL NATURAL HISTORY SOCIETY. P^ A P E R ON ARSENICAL POISONING, -DUE TO- THE COMMERCIAL SND DOMESTIC USES OF ARSENIC. Re-Printed from the " Montreal Herald " of January 19TH, 1886. • ••, ... .1' ' • •* • . • • j^rn j^ is^^jETiitTa- -OF THE- Natural History Society of Montreal, The President, Sir William Dawson, LL.D., F.R.S., in the Chair, THE POTLf»WINa TAPER WAS READ BY DR. J. BAKER EDWARDS, F.O.S., Public Analyst for the Montreal District of Inland Eevenue. Mr. PrepiHent and Gentlemen : The recent outbreak of the epidenoic of enal pox in our midst, and it-t viworouH extinction, illuntrate mo^t forcibly, firstly, that if tlie knowledge we poaseuM is prac- tically applied dineasemay be euccesnfully com batted and stamjed out; whereas, secondly, it is equally clear that *' preven- tion" would have been ''better than cure," and that had we applied our knowledge at the right time we should have escaped this fatal and injurious calaa.ity. 'J'he ecience of Lygiene is directed to the eradi- cation of preventible disease, and should also, I think, cover preventible loss of life by accident or poihon ; moreover, loss of health should be regarded as next in importance to loi^s cf life. Recent eventti have called my attennon to the careless (if not crimina') use of arsenic sold for domestic purposes as a rat poison, by which eleven persons suffered severe sickness and had their lives endanger- ed in this citv, since whicn a similar case has occurred in Ottawa Five members of a family residing there had an ^qnally narrow escape while eating their Christmas dinner, from the same dargerous weapon, " Kongh on Rats," a poit-oii which contains some 90 per cent, of white arsenic ; a box ofwiich is sold by grocers and druggists for 15 cents, contain- ing enough poison to cause the death of 200 jdersons. The law regulating the sale of poisons for the Province of Quebec re- quiren the registration of the sale of ar^enic and arsenical preparations sold as such, but this subt-tance sold under the *' nom de plume" of "Rough on Rats," being " registered trade mark," escapen this restriction. So many accidents arise from its use that some druggists refuse to keep or to sell i:, and representations will Ite made to the Goverumentin c nsequence of these accidents, which will probably restrict or prevent its sale in the future. Now that the attention of the pnHlfc has been calltd to this subject, I think it tuay be useful to sound the alarm in respect of the extensive and dangerously increasing use of arsenic in manufactures, agriculture and domestic clothing and furnishing, as I believe the public generally is unaware of he extent to which families are ulcousciouh- ty brought into contact with this poison, and thereby become liable to suffer pro- tracted ill-health, or even fatal result. For arsenic is said to have four distinct forms of action, varying with the dose and the mode of admin -itration, and with the s usee ntibi lily or idiosyncrasy of the patient. These tonus of action are known as :— 1 The acute. 2. The sub-acute. .S. The nervous. 4. The chronic. As some of these eimu'ate forms of dis- ease in inflammatory action, the real cause is often unsuspected. I propose to bring under your attention the danger arising from the handling of arsenic in MANUFACTURES, AGRICULTURE AND DOMESTIC USES. ARSENICAL MANUFACTURES. In the smelting of arsenical ores, such as cobalt, nickel, iron and copper, it is well known that the arsenical fumes in- juriously affect the health of the workmen so employed ; and from the tall smoke stacks or giant chimneys of Glasgow, Lancashire and Cornwall, a prevailing steady wind, or current of air will often carry the t^moke contiuning these fumes over a distance of a mile or two, destroying vegetation by the vapor of oxidized sul- phur, and covering hedges, herbage and f>jliage with a fine white hoar fr st of arsenic which proves fatal to sheep and cattle so imprudent or so famished as to pat-take of it. In the manufacture of shot and of glas-J, arsenic is an essential ingre- dient, and is used in large quantities, and the .'^urroujiding air is contatuinated by the fumes proceeding from these furnaces. I a. I r In the raanufact'i'i of oil of vitriol from arsetiical pyrites, much danger arises, m- afliiiuch as tlie a'senic remains disfolved in the acid and may thus i»'i«h into the salts made therefrom ; taus Epsom Salts has b^en found to contain arnenic due to impurity, and hydroclil iric or muriatic acid frequently coatuins arsenic from the eamp source. A case of extensive poisoning occurred in Lou'ion a few years since, arising from the use of arsenical muriatic acid in the manufacture of bread by Dr. Dagliesh's process, for which rea«ou cream of tartar is now generally substituted la baking powder and in self raising flour. In cases, however, where acid phos- phates are substituted for cream of tartar, a danger of the presence of arsenic from the use of impure sulphuric acid still exists. I am gla 6 travelled to Chica«;o, wearing? these throiiglj the nitjlit. He t'elt a tiiit;linK Hen- Matiun in the bullo.v of the foot, which in- creased, and Rore-4 opened ahoiit the ankle and calf «jf the 1 ^. He applied to Dr. Hurlhurt, of Chicago, who at once pro- nounced it to be due to tlie poinonoun dvc, and Hiuted that he had had Hfiy t^irnilur cases within the previous three niontha. The iientletiian was contined to bed for ten dtt_v^, but it whh nix montliH before he entirely recorered frou) the ill ttfct-'. ABSENI04L OAMHItlC. A lady who purchaHeci a dress, war- ranted to wash and to be " Foulard cani- b ic," with narrow strips of lij;ht and 'ntaining arsenical pigments, also the paper known ;\s '* papier itacre " shall be pruhibited. The list of prohibited colors contains pigments of lead, mercury, arsenic, cobalt, copper, chromium and antiaiony. IN SWEDEN. The prohibitory law enumerates the above an i " other articles in water colors : — excepting such as shall contain a mere trace of arsenic from 50 square inches." The same protiibition applies to " stuffs textiles yarn, lamp shades, sealintr wax, wafers, ca.idlee, and other substances, with the similar exception of minute traces only. IN AUSTRIA. A decree was issued in 1876, prohibiting the U3e of aniline colors of every kind, in food and in fabrics, to be worn in contact with the human body, also of mineral waters containing arsenic, copper, lead, zinc and other poisonous metallic prepar- ations. In Baden, Bavaria, Denmark, Hesse Darmstadt and Saxony, similar re£"la- tioDS have been made. In France and Biijiland and the United Slates these regulations only apply to articles of food and drink, but vigorous efforts are being made by sanitary reformers to extend these prohibitory reyulations to the class of articles which experience has proved to be dangerous to the health and lives of the community at large, a course which I venture to think Canada would do well to adopt. Dr. T. Sterry Hunt remarked that he had been much interested in the variety of information which waq embraced in Dr. E<1 wards' valuable paper. It occurred to him that when he had visited guld m'nes in the west, where ar- senical pyr'tes are worked, to enquire what became of all the arsenic, and he found that this was accummulated to the extent of hundreds of tons, and efforts had been made to get rid of it by mixing it with buperpbosphate of lime iD manure for the purpose of de- stroying burrowing insects, t)ut even this did ant make much demand on this large accumulation. He also ei quired whether it atft-cted the health of the workmen, and this was admitted, but it was stated that ihej became inured to it, or if much affected ceased this employment, and the local irritation produced was relieved by p lultices of oxide of iron, which appeared to be the best antidote to its effects. Mr. R. W. McLachlan enquired if it poisoned grubs in the ground would it not also kill the earth worms which were now reckoned the most important subsoil fertilizers. Dr. Hunt said he was »ir»id the earthworms had been left out of the calculation, but as a geologist he would not like to los" them and perhaps if they were poisoned the birds who lived upon them would also be destroyed and the face of nature would be changed for the worse. Large quantities of arse'' " th soil would certainly be dan/r* water sources. Dr. Wan less expressed ■ of the paper from which be i^ great dea;. Prof. Penhallow said soi; d come under his notice which n. io believe that skin eruptions from dyeu un- derclothing were more common than us- ually supposed. He also believed that certain brands of cigarettes cal ed '* sweet " contained either arsenical paner or some other poison which caused a specific sore throat or ulceration of the lips, and he would direct Dr. Edwards' attention to this source of poison. He hoped Dr. Ed- wards would publish his paper in the Record of Science. Sir Wm. Dawsot<, in moving thanks to Dr. Edwards for his contribu- tion, said it was a practical and valu- able paper, and he hoped it would be published in the Record and have in- fluence with ihe Government in adopting proper restrictions on the sale and use of sucti dangerous poisons. i Printed at the Office of the "MONTREAL HERALD," I