641 
of Edhihm^gh, Session 1883-84. 
Sulphate of Zinc gave an entirely similar result. 
Chloride of Zinc. — Koch has given a very unfavourable verdict 
with regard to zinc chloride in one uf his experiments. Anthrax 
spores grew well after a mo-nth’s sojourn in a 5 per cent, solution. 
Experiments were made with solutions of 1 per cent.,, 5 per cent. , 
and 25 per cent, solutions. 
I found the short steeping of an hour in a 1 per cent, solution 
stimulating the subsequent growth of the spores, the vegetation at 
the end of twenty-four hours being more active than in the com- 
parison liquid. 
Steeping the spores for twenty-four hours in a & per cent, solution 
did not seem to exert any influence on their development. 
Steeping the spores in a 25 per cent, solution arrested the life of 
the spores, that is, so far as artificial cultivation is concerned. 
Chloride of Zinc and Thymol. — Thymol was shaken up with 
water, and the thymol water thus obtained used as a solvent for 
zinc chloride, the solutions being made up to 1, 5, and 25 per cent, 
strength. In each case the behaviour was the same as in that of 
the pure solutions of zinc chloride, the addition of thymol in no 
way adding to or diminishing the action. 
Perchloride of Iron. — Yarious strengths of a solution of ferric 
chloride in water were made from 1 up to 2,5 per cent.,; but in no 
single case did a twenty-four hours’ steeping of the spores destroy 
their vitality. With, the stronger solution the vegetation was late, 
but ultimately luxuriant. With 1 per cent, solution the develop- 
ment was more rapid than, usual, the growth, beings as it were, 
stimulated., 
Terehene. — A sample of terebene, said to be pure, had no effect 
on the spores ; but on examination the so-called terebene was found 
to contain TO per cent, of unchanged' turpentine. 
Another sample, which was certainly pure, gave better results. 
Spores soaked twenty-four hours in this terebene did not grow in 
sterilised broth. 
A solution of the terebene in strong alcohol, so as to be exactly 
10 per cent., experimented with as in the former case, delayed the 
growth, but it was ultimately luxuriant. 
The terebene which seemed to have germicidal powers was further 
experimented with by Dr Klein. Spores soaked in it twenty-four 
2 T 
VOL. XII. 
