8 
the vibrating motions of the micrococcus immediately. Sul- 
phate of copper does the same, and also destroys the ‘ spores.” 
Hypermanganate of potassa imparts a straw-like color to the 
fungi, while its own solution is discolored immediately upon 
contact with them. 
In accordance with these results, I selected, for further ex- 
periment, two horses in different stables, both of them strongly 
affected with the disease, and each standing by the side of 
another horse in a like condition. A solution of sulphate of 
copper (one or two grains to four oz. distilled water) was then 
applied; a teaspoonful was injected into the nostrils, and 
about the same dose was given on the top of some moist feed. 
Kach horse also received two drachms of sulphate of quinine, 
in half-drachm doses, morning and night. Within 24 hours 
a marked change took place; and both animals recovered 
fully eight days sooner than the others that were not thus 
treated. Finally, as it might be possible that some of the 
exhaled micrococcus should attach itself to the stable walls, 
grow there, and thence respread the complaint, it was ordered 
that the stables should be thoroughly whitewashed with a 
strong solution of chloride of lime. 
I am well aware that these two cases alone can not be ac- 
cepted as a sufficient proof for the correctness of the theory, 
or of its application to the recent horse epidemic; but the 
facts as here given deserve, perhaps, more attention than 
they have as yet received. 
Pror. LEEps, of the Stevens Institution of Technology, 
read a note ‘on the Volumetric Determination of Chlorine 
with standard silver solution and potassic chromate.”* 
Dr. I. WAuz made a preliminary notice of the potassium 
salt of what he judged to be a new acid, which he had ob- 
tained by the simultaneous action of picric and pyrogallic 
acid on potassium cyanate. 
The Secretary read a paper by Dr. O. W. Morris, on the 
meteorology of the month of December, 1872. The month 
was remarkable for its changeableness, its general low tem- 
perature, and the large amount of snow that fell in a single 
storm. The range for the whole month was 41°, and the 
mean 28°86", a lower average, by a little over five degrees, 
* Since published in the American Chemist, for February, 1873. 
