﻿8 THOMSON, Presence of Arsenic in the Body. 



cum-Hardy, in Manchester, and one from Bramhall, near 

 Manchester. 



Mr. Chisholm also sent me two samples from his own 

 cows. The results obtained from these samples are shewn 

 in Plate II., Fig. 3. 



No. 1 contained less than ^^-th. Nos. 2, 3, and 4 

 contained about ^-g-th each : all these were bought in 

 Manchester. No. 5, from Chorlton-cum-Hardy, contained 

 about TT ^-oth. No. 6, from Bramhall, contained T \^d\ of 

 a grain per gallon ; whilst the two samples from Loch- 

 maddy, in the Hebrides, showed no trace of arsenic 

 mirrors. 



As to sources of pollution besides contaminated air, I 

 thought it probable that steaks and chops grilled over a 

 coke fire would contain some arsenic from the fumes of 

 the coke. I therefore obtained from the Reform Club, 

 through Mr. F. Scott, a steak which was divided into two 

 parts, one left raw, the other " well done " over the grid. 

 I cut 5 grammes from each through the pieces ; the raw 

 steak was free from arsenic, and the grilled steak con- 

 tained a trace which was barely visible, amounting to not 

 more than the 2Wo tn °f a g ram P er lb- See Plate I 1 1., Fig. 1. 



Thinking the arsenic might be adhering to the outside 

 of the steak, I cut 5 grammes from the outside surfaces, 

 but found it contained but little more than the portion 

 which I cut across. It is satisfactory, therefore, to feel 

 that the operation of grilling practically does not con- 

 taminate the meat with arsenic from the coke. This is 

 probably due to the fact that there is a rapid current of 

 air between the fire and the meat, which no doubt 

 efficiently carries away the arsenic fumes and dust from 

 the coke. 



I next examined four different brands of cigarette 

 paper, and found all to contain arsenic. 



