REVIEW OF THE DUBLIN PHARMACOPOEIA. 
11 
Magnesia Carbonas Ponderosum is officinal. 
Soda Bicarbonas, is prepared in the old way by passing a cur- 
rent of carbonic acid into a solution of the carbonate. 
Zinci Carbonas is prepared by double decomposition between 
chloride of zinc and carbonate of soda. 
Calcis Chlorinates Liquor is a solution of half-a-pound (av.) of 
chlorinated lime in half-a-gallon (imp.) of water. 
Calomelas is the name for calomel. 
Sublimatum Corrosivum is the name for corrosive sublimate. 
Zinci Chloridi Liquor is a solution of the salt of sp. gr. 1.593. 
Decoctions. — -In these preparations the quantities, with six ex- 
ceptions, are but half a pint, and with two exceptions the length 
of the ebullition is but ten minutes. This is a decided change for 
the better. If time is expended on these preparations, it would 
be better to precede a short period of ebullition by cold macera- 
tion. 
Ether Sulphuricus. — In this formula quick lime is used in- 
stead of caustic potassa, in freeing the product from sulphurous 
acid, previous to its rectification. 
Spiritus Ethereus Oleosus. — Under this name Hoffman's ano- 
dyne is known in the new code. In the Pharm. 1826 the process 
for its preparation was exceedingly defective — it merely directed 
the residue left in making sulphuric ether to be distilled until a 
black froth commenced to rise in the retort without any subsequent 
treatment of the distillate. In the formula of 1850, a pint of recti- 
fied spirit is acted upon in a retort with a pint and a half of sulphuric 
acid until the rising of the black froth renders it necessary to stop 
the distillation ; the distillate is exposed for twenty four hours till 
the ether has evaporated, when it is washed with a little water 
and introduced into a bottle containing 10 fluid ounces of alcohol, 
and 5 fluid ounces of ether. This process is therefore a combination 
of those for oil of wine and compound spirit of sulphuric ether, 
and is a great improvement on the one of 1826. 
Extractum Aloes Aquosum, is a useless preparation made by 
boiling hepatic aloes in 10 parts of water till dissolved, exceptthe 
dregs, and evaporating. 
Extractum Cannabis Indict Purification is an alcoholic extract 
of an alcoholic extract ! If the substance treated was ever good, the 
