218 
POISONING BY ARSENIC. 
microscope was found to consist of epithelial scales, among 
which were crystals of carbonate of lime and the phosphates. 
The inference is clear. The composition of the calculus 
is carbonate of lime, mixed with the phosphates, and animal 
matter. 
The two smaller urethral calculi were of a very irregular 
form, and weighed together only one drachm.] 
Facts and Observations. 
M. BATKA ON QUINIO OR ROUGH QUININE. 
A substance is known in the Brazils under the name of 
quinio, which is extracted from the fresh bark of the 
cinchona by lime, and then from the lime by alcohol. It is 
very rich in quinine, and it is only necessary to boil it with 
dilute sulphuric acid to obtain an abundant crystallization of 
pure sulphate of quinine. 
Quinio is a yellow body of a resinous appearance and of a 
bitter taste. It is insoluble in cold and but slightly soluble 
in boiling water. It is verj soluble in alcohol and ether, 
separating partially from the latter by exposure to the sun. 
Water precipitates the alcoholic solution. It is almost entirely 
soluble in weak sulphuric acid, from which soda precipitates 
it of a dirty white colour, the precipitate assuming the 
appearance of a resin. A beautiful white sulphate, however, 
may be prepared from it. 
Quinio is free from cellulose; when heated it gives off an 
odour something like cinnamine; and burnt, leaves a light 
residue of carbonate of lime. It resembles a good deal the 
quinoidine of Liebig, but is much purer than the quinoidine 
of commerce .—Chemical News* 
POISONING BY ARSENIC. 
Dr. Blondlot has communicated, in a paper to the 
Paris Academy of Sciences, a fact which may be highly 
valuable in cases of poisoning by arsenic. After numerous 
experiments, he has come to the conclusion that the slightest 
quantity of greasy matter in contact with arsenious acid will 
reduce its solubility to about one-twentieth of what it was 
