MISCELLANY. 
79 
phate of iron. It is then carefully decanted from above the solution and 
deposite, and a perfectly white and well purified linseed oil is obtained, 
and which moreover dries very easily. The sulphate of iron employed 
in this operation will serve again if the solution is filtered and evapora- 
ted to crystallization. — Ibid. 
Dentifrice of M. Mialhe. 
Take of 
Sugar of milk or Lactine - - 400 grammes 
Pure tannin - 6 " 
Carmine lake - 4 44 
Ess. of mint (English) - 
Ess. of anise of each 8 drops 
Ess. of orange flowers - - 4 44 
Grind the Tannin and Lake with a small quantity of lactine careful- 
ly in a flat bottomed porcelain mortar, and add afterwards the remain- 
der of the sugar of milk and the essences, and triturate until the mix- 
ture be perfectly homogeneous. The sugar of milk, .although soluble, 
is sufficiently resisting to act mechanically on the enamel of the teeth 
without altering it, and the tannin is useful from its astringeucy in keep- 
ing the 44 gums" in a proper state of tonicity. 
Reagents to distinguish between Cherry Laurel Water and that of 
Bitter Almonds. — According to M. Weber, ammonia will establish a 
marked difference between these two distilled waters, when treated in 
the following manner : Take two test-glasses, and pour into them sepa- 
rately a few drops of these two waters, then add to each a drop of liquid am- 
monia. Agitate, and then allow it to remain quiet; the cherry laurel 
water acquires a milky color, while that of bitter almonds undergoes not 
the slightest change. 
Dr. Aschoff has observed that thirty drops of cherry laurel water, 
form with five of sulphate of quinia, a solid mass, while the same phe- 
nomenon is not produced with the concentrated water of bitter almonds. 
The volatile oils of the same products present analogous differences when 
submitted to the same proof. — Journ, de Chim. Med. 
Note upon Cantharides. By M. Batka. — We owe to Dr. Metren- 
heimer, of Giessen, the fact, that the Lytta Syriaca is mixed with the 
cantharides of commerce. I confine myself to stating this fact, ob- 
serving, nevertheless, that I have never found this insect in the can- 
tharides of Hungary, as states Dr. M., but very often in that of Mol- 
davia, Once such admixture, which I had not observed, was the cause 
