314 Proceedings of the Royal Society of Edinburgh. [Sess. 
there is some diminution in the number of polymorpho-nuclear leucocytes, 
which tends to accentuate the sign, but the lymphocytosis is nevertheless 
an absolute one. Moreover, in Cases 13 and 15, which show a fairly well- 
marked leucocytosis, there is still a lymphocytosis. These cases are given 
in detail below. 
Table II. 
Case. 
Leuco- 
cytes. 
Per cubic 
millimetre . 
Poly- 
morphs. 
Per cent. 
Lympho- 
cytes. 
Per cent. 
Tol 
Poly- 
morphs. 
;al. 
Lympho- 
cytes. 
( minimum 
5,500 
3850 
1.100 
Normal < average 
7,000 
70 
20 
4900 
1,400 
( maximum 
9,000 
... 
... 
6300 
1,800 
1 
Severe case .... 
5,000 
50 
40 
3500 
2,930 
3 
Persistent symptoms 
5,968 
47 
44 
2820 
2,676 
4 
5 ? 5 ? 
6,570 
33 
60 
2168 
3,942 
7 
Slight case .... 
7,812 
58 
35 
4530 
2,734 
9 
Severe case .... 
6,562 
39 
51 
2593 
3,360 
10 
Very slight case . 
8,124 
62 
30 
5036 
2,437 
11 
55 55 
7,184 
72 
23 
5047 
1,638 
16 
Severe case .... 
9,686 
75 
21 
7264 
2,034 
12 
55 .... 
5,000 
35 
58 
1750 
2,900 
13 
Moderately severe 
8,122 
47 
47 
3816 
3,816 
39 
Severe case .... 
11,562 
50 
46 
5781 
5,300 
15 
,, (2nd exam.) 
17,000 
37 
58 
6401 
10,034 
13 
5 ' 55 
15,000 
44 
46 
6600 
6,900 
Table III classifies the cases according to the degree of lymphocytosis. 
It will be seen that all with a count of 50 per cent, or more of lymphocytes 
are severe cases, with the exception of 21, which was a slight case of 
gassing, but the symptoms have persisted to the present time, i.e. sixteen 
months after the gassing. Of those with a lymphocyte count of 40 per 
cent, or over, all, with the exception of three, 14, 31, and 35, are severe cases 
or cases with persistent symptoms. To these one other, 44, should perhaps 
be added, but it is of too recent occurrence to be sure of the course it will 
follow. Too much stress cannot, of course, be laid on these percentages, 
but we have found that they are wonderfully constant on repeated 
examination, and in blood counts made by different observers. 
A classification of the cases according to the period which has elapsed 
since the gassing (Table IV) does not yield any very definite information 
beyond the fact that the sign is a very persistent one, and has not dis- 
appeared in any instance in our experience. 
In this relation we were fortunate in being able to examine the blood 
of two schoolmasters (Cases 42 and 43) who had been gassed with chlorine, 
