319 
1916-17.] Observations on the Blood in Gas Poisoning. 
a fairly sharp illness, recovered, and were able to resume their usual 
avocations. 
The cases with marked and persistent respiratory symptoms are most 
numerous. The common complaints are pain in the chest, cough, and 
breathlessness. Such cases are 2, 8, 9, 12, 25, 26, 27, 28, 30, 33, 34, 37, 39, 
41, and 45. 
Case 9 is the case already noted, which first drew our attention to the 
condition. 
Case 31 was gassed July 25, 1916 (shell). He was partly buried by 
the explosion and stunned. He had breathlessness from the first, also 
vomiting. He was conscious at the time of a sweet, rather pleasant, odour. 
At the time of examination, October 20, 1916, he had a slight cough, and 
somewhat copious catarrhal expectoration. He had a scorbutic skin 
condition. The percentage of polymorphs and lymphocytes was the same, 
viz. 49 '4 per cent, of each. This case is classified as one of the four slight 
cases we have observed with a high lymphocyte percentage. 
Case 37 was gassed September 25, 1915, by British gas from a burst 
cylinder. He was rendered unconscious by the shell, which burst the 
cylinder, so that he had a good dose of the gas. When he recovered con- 
sciousness he started coughing and vomiting. He complained (October 
10, 1916) of pain in the right side of the chest, and was troubled with 
wheezing and coughing. His medical man, not being able to make out 
much in the way of physical signs, regarded the man as a humbug. His 
blood count proved to be : — polymorphs 37 ‘8 per cent., lymphocytes 54'8 
per cent., showing that he was a genuine case of gas poisoning. 
Case 39 was gassed October 15, 1916 (by shell gas). He noticed a 
sweetish odour which caught his breath. He was unconscious for four 
hours. Oxygen was administered for four days. His most prominent 
symptoms-, when seen by us, were breathlessness, pain and tightness in 
the chest, and giddiness. He complained also of impaired digestion. His 
blood count was: — polymorphs 44 per cent., lymphocytes 54*3 per cent. 
His leucocytes numbered 11,562. 
Case 41 was gassed May 1916 (shell). He did not feel much at the 
time. A few days afterwards he developed cough and breathlessness. 
He is still suffering from bronchitis. His blood count is : — polymorphs 
50 per cent., lymphocytes 45 per cent. 
The remaining cases may be classified into groups according to the 
nature of the chief symptoms. The larger proportion show at some period 
more or less marked symptoms associated with the respiratory passages. 
In another series of cases the symptoms are mainly gastric. Not inf re- 
