Miscellany. 
87 
a red colour, which is a sign that the decomposition has been perfectly 
effected, and that citrate of quinine is formed. The liquor is to be fil- 
tered while near boiling 1 , and on cooling, the salt crystallizes ; at the end 
of six hours, the crystals are to be separated from the mother liquor, 
drained and washed with a little distilled water, and pressed. They 
may be dried between folds of bibulous paper, and pressed. On evapo- 
rating the mother water, more crystals are formed, and the whole of the 
salt thus obtained. Jlnnali Univer. di Med* 
White Agaric. M. Andral has found that the white agaric, (Boletus 
larycis,') is capable of checking the night sweats in consumptive patients. 
He uses it at first in doses of 8 grains, made into pills ; then increasing 
to 48 or 60 grains a day, without any sensible derangement of the diges- 
tive functions being produced. Journ. de Pharm. 
Mastich for carious teeth. Various articles have been used to fill the 
cavities of carious teeth, as resinous, balsamic or saline compositions, the 
fusible alloy of Darcet, and leaves of various metals, as gold, silver, lead 
&c. But all these are sometimes insufficient or impracticable, where the 
tooth is much decayed, or the nerve is exposed. In the first case, the 
filling employed is liable to fall out; in the second, proper force cannot 
be applied, on account of the pain. In such circumstances the following 
compound has been found useful : 
Mastich, 4 parts, 
Sulphuric ether, 1 part. 
The solution of the resin is readily effected, without the assistance of 
heat, in a well closed vessel ; the result is a liquid of a lemon yellow co- 
lour, of an oily consistence, which, on exposure to the air becomes of the 
consistence of pitch, and at last quite friable, but softening by a moderate 
degree of heat. To employ it, a small dossil of cotton, of a size to fill 
the cavity of the tooth, is to be saturated with the liquid, and introduced 
into the decayed tooth. By the heat of the mouth, the ether is soon dis- 
sipated, and the remaining resin adheres firmly to the tooth ; this resin 
remains sufficiently soft not to be detached in scales or fragments, and 
completely protects the interior of the tooth from the action of the air, 
and the introduction of fragments of food. 
Journ. de Pharm. 
Prussian blue. Mr. G. Lowe, of London, has taken out a patent for 
making Prussian blue from the refuse of coal gas works. To produce a 
pure blue, he directs one ounce of sulphate of iron in solution, to be well 
mixed with one gallon of the ammoniacal liquor of a specific gravity of 
1.031. To the mixture is then to be added fourteen ounces of sulphuric 
