54 Proceedings of Royal Society of Rdinhurgh. [dec. 5, 
lungs. Amongst these experiments he has used volatilised iodine 
in the following way: — The apparatus (fig. 13) explains itself, and 
is very simple. 
According to Mr Snodgrass, the patient should, if possible, inspire 
gently by the mouth (from the mouthpiece D) and expire by the 
nose, taking as full and as deep inspirations as possible. He con- 
siders that although the iodine may not reach very deeply into the 
lungs, it will cleanse the throat, larynx, trachea, and the large 
bronchi. Concerning the value of his device of inhaling volatilised 
iodine, he says — “ The inhalations of iodine have certainly put the 
hand hack on the dial in my case for nearly two years.” 
Concerning the adoption by Mr Snodgrass of Dr Bergeon’s and 
also my process of hypodermic injection of a solution of a salicylic 
acid, I have his permission to make free use of his letters, in which 
he describes the experiments performed and results obtained. 
Abstracts from these letters I shall give as an appendix to this 
memoir. By so doing, it will make the paper far more valuable (as 
they come from a literary man, and a man of sound common sense) 
than any written description I could give of his trial of the two 
methods. 
Mr Snodgrass firmly believes in the value of both methods, and 
much good has been done by using them. When he wrote to me 
in February (1887) he was apparently a dying man. He greatly 
improved by using the methods j in fact, so much so that he was 
able to leave Glasgow and spend the summer in the Kyles of Bute. 
During his experiments, I have reported on many occasions the 
microscopical appearances of specimens of sputa received from him, 
and it was surprising to note from time to time the decreasing 
numbers of bacilli present. Although there appears, in the last 
specimen of sputum received on 28th September 1887, to be an 
increase in their numbers (due to the fact that Mr Snodgrass has 
for a short time desisted from using the methods, owing to great 
physical weakness), there was no increase in the quantity of 
Freund’s cellulose in the sputum ; showing the inactivity of the 
bacilli present. In fact, their “ pathological power ” appears to be 
proportional to the quantity of cellulose found in the sputum. 
At this point I will refer you to the appendix of this paper, 
where Mr Snodgrass states in his own words the work that has 
