Report of Work on Protective Inoculation for Anthrax^ 8fc. 449 
not be depended upon to fight against it alone. If there 
were no parasites, it would be necessary to import some, if 
possible — to " colonise " them, as the American entomologists 
term it — but, fortunately, they have come over with the enemy, 
and all due and proper care must be taken of them. 
No one can foretell the course of the Hessian Fly in this 
country, whether the climate will be suitable for its increase, as 
in America and Russia, or whether other conditions will be 
favourable to its development. From the greater amount of 
winter cold in both those countries it might be supposed that 
the climate of Great Britain would be more suitable for the insect. 
According to the American entomologists, damp, mild seasons 
conduce to its spread, but frosts of the most severe character do 
not affect it. In Russia Dr. Lindeman noticed that heavy rains 
were most injurious to the Fly in the autumn. Though there 
had been a serious attack in Pultowa in the spring of 1886, the 
flies were completely cleared away by the continuous rains at 
the end of the summer. Professor Riley expresses the opinion 
that the Hessian Fly will not prove a very serious plague to 
British Agriculturists. The Professor has had more experience 
upon this subject than any man living, and we can only hope 
that his prediction may be confirmed. 
XXI. — Re-port of Experimental Work on Protective Inoculation 
for Anthrax and Quarter III. By William Robertson, 
Principal of, and JoHN Penbeethy, Professor of Therapeutics 
at the Royal Veterinary College. 
In obedience to instructions received from the Veterinary Com- 
mittee of the Society, we have been engaged in experimental 
inquiries into Protective Inoculation for Anthrax aud Quarter 
111, and, acting on the suggestion of the Committee, our efforts 
have been principally directed to providing means of pro- 
tective inoculation against Quarter 111, and with the view of 
testing the statements regarding the efficacy of Pasteur's pre- 
ventive for Anthrax. 
The commencement of this work was, we regret to say, much 
delayed by the tedious process of obtaining a licence from the 
Government to carry out such part as was deemed purely expe- 
rimental ; four months having elapsed between the dates of 
application for and receipt of the official permission. 
In further detailing what has been done, we will relate first 
what pertains to Anthrax — or Splenic fever — and to the employ- 
