158 
MISCELLANY. 
It appears that the entire amount of benzoic acid of the resin is ob- 
tained in this manner; and it may be observed, with reference to the 
pharmaceutical application, that the acid so prepared possesses entirely 
the odor of the sublimed acid. Whether the stated proportions of resin, 
muriatic acid and alcohol are the most advantageous, I am not able at 
present lo say. — Liebig's Annalen,from Lond. Chem. Gaz. 
Cement for the Teeth. By Ostermaier. — According to Ostermaier, this 
cement is prepared by mixing 52 parts of chemically pure and finely- 
powdered caustic lime with 48 parts of pure anhydrous phosphoric acid» 
obtained by the combustion of phosphorous in dry air; the mixture is 
rapidly triturated in a mortar. 
A sufficient quantity of the powder thus prepared is then introduced 
into the cavity of the carious tooth ; it is strongly compressed, and the 
surplus is equalised as much as possible, then it is slightly moistened. 
It must be observed that this powder can be used only in one or two 
minutes ; consequently, it should be prepared only just before it is used. 
-—Lond. Chemist, from Jahrbuch fur Praktische Pharmacie. 
On ilit Means of Preventing or Curing the Injuries Caused by a long 
Decubitis. By Dr. Tott, of Ribnitz. — Besides the means already 
known and used for preventing ulcerations by decubitis, Dr. Tott makes 
use of the following mixture, the formula of which is due to the cele- 
brated Mursinna:— 
Ijc. Tincture of camphor 1onr> 
Goulard's vegeto-mineral water $ P arts * 
Mix. 
With this mixture the points of the skin which have been rendered red 
by continued pressure, are washed, and these washings are repeated 
several times during the 24 hours, taking care to shake the bottle well 
before pouring out the quantity of liquid necessary for each application. 
If, notwithstanding the employment of this mixture, the symptoms 
remain, and the skin begins to ulcerate, Dr. Tott rubs the wounds with 
an ointment of lead and zinc, or, again, with the camphorated white 
rhazes : in the most serious cases he had recourse to tannate of lead, 
under the following form : — 
R. Recent tannate of lead - - - 12 parts. 
Lard 30 " 
Make a perfectly homogenous ointment. 
He applies this mixture three or four times a day. 
But the best means which the author prescribes, as well by way of 
prophylatic for phlogosed surfaces, as for cicatrising those which are al- 
ready ulcerated, is the creosotic water prepared according to the pro- 
