688 
T. L. BOLTON. 
io minutes, estimated at 945; 15 minutes, estimated at 510# 
Counted after 72 hours. 
In the three following - plates, the bacillus subtilis was ex¬ 
posed to a 3 per cent, solution of the acid. The bouillon 
culture or subtilis was 24 hours old, filtered through glass 
wool. 
Plate VII.—October 24. Control plate, estimated at 500; 
5 minutes, 74; 10 minutes, o ; 15 minutes, o. Counted after 
72 hours. 
Plate VIII.—October 24. Control plate, 496; 5 minutes, 
89 ; 10 minutes, o ; 15 minutes, o. Counted after 72 hours. 
Plate IX.—October 24. Control plate, 647; 5 minutes, 84; 
10 minutes, o; 15 minutes, o. Counted after 72 hours. 
Conclusion. 
The question now arises, what conclusions are we justified 
in drawing from this work ? 
1. I claim to be justified in asserting that carbolic acid is 
a disinfectant. 
2. That a two per cent, solution of the acid will destroy 
the staphylococcus pyogenes aureus immediately on coming 
in contact with the organism. 
3. That 11 per cent, solution will destroy these organisms 
within five minutes. 
4. That a 1 per cent, solution will destroy these organisms 
within fifteen minutes. 
That a 3 per cent, solution will destroy the spores of the 
bacillus subtilis within ten minutes. 
- - 
A STUDY OF THE SPINAL CORD OF A SPRING-HALT HORSE* 
By T. L. Bolton, M.D., Boston, Mass. - »’| 
The horse from which this cord was taken had belonged 
to a farmer living near Boston. The animal was about twenty 
years old, and was known to have been afflicted with spring¬ 
halt five or six years before 1891, when it was destroyed. 
Duiing this time it had become continuously worse, and at 
* An abstract of a paper read before the Massachusetts Veterinary Associa¬ 
tion, at Boston, June, 1892. Reprint from The Journal of Nervous and Mental 
Disease. 
