14 
REVIEW OF THE DUBLIN PHARMACOPOEIA. 
an equal bulk of water, and afterwards evaporating till the solu- 
tion measures two fluid ounces and a half. 
Volatile Oils, are directed to be prepared in the usual^way, and 
the distilled water obtained with them, kept for medical use. 
Adeps Suillus Prceparatus is hog's lard that has been melted with 
twice its weight of water, and after being stirred suffered to cool, 
and the lard separated for use. 
• Unguent um Cantharidis is made with eight fluid ounces of Lini- 
ment of Spanish flies, three ounces of white wax, and one ounce 
of spermaceti. It is a more active preparation than that of the 
U. S. P. 
Unguentum Picis Liquidce. In this preparation the suet has 
been abandoned ; ten fluid ounces of tar being incorporated by 
fusion with four ounces of yellow wax. 
Ammonia Liquor Fortior, is directed to be of sp. gr. .900. 
Argenti Oxidum, is directed to be made with lime water; half a 
gallon being used to decompose half an ounce of nitrate of silver, 
dissolved in four ounces of water, — the precipitated oxide is after- 
wards washed with distilled water, dried below 212°, and preserved 
in a bottle — nothing is said in reference to preserving it from the 
light, a precaution quite necessary. 
Emplastrum Ammoniaci, is ammoniac purified by solution in 
proof-spirit with the aid of heat, strained and evaporated to the 
proper consistence. The old menstruum was vinegar of squills. 
Emplastrum Resince, contains one eighteenth of its weight of 
Castile soap. 
Pulvis Antimonialis , is made by a new process ; the old method 
by deflagration being totally abandoned. It is as follows : — 
" Take of tartar emetic, and phosphate of soda, of each four 
ounces ; chloride of calcium, two ounces ; solution of ammonia, 
four fluid ounces ; distilled water, one gallon, and a half, or q. s. 
Dissolve the tartar emetic in half a gallon, and the chloride of cal- 
cium, and phosphate of soda each in a quart of the water. Mix 
the solutions of the tartar emetic and phosphate of soda, when cold, 
and then pour in the solution of chloride of calcium. Boil now 
for twenty minutes, and having collected the precipitate, which 
will have then formed, on a calico filter, wash it with hot distilled 
water, until the 1J quid which passes through ceases to give a pre- 
cipitate with a dilute solution of nitrate of silver. Finally, dry 
