20S 
BRITISH AND UNITED STATES PHARMACOPOEIAS. 
U.S. Pharmacopoeia; and the preparation was introduced 
under the name of Liquor Ferri lodidi, honey being the 
protecting substance selected. Thus, then, the syrup and 
solution, severally, of the two Pharmacopoeias are equivalent 
preparations, rendered unchangeable, the one by sugar, the 
other by honey, and devised in distant countries as the result 
of independent researches. 
Linimentum ammoniae compositum. Compound Lini- 
ment of Ammonia. This is evidently an imitation of Dr. 
Granville's counter-irritant lotion. The College have very 
improperly ordered it of two different strengths; because they 
allege it may be required weaker for some purposes. We 
object to this, as giving two different preparations the same 
name. Either the weakening of the stronger liniment must 
be left to extemporaneous prescription, or, if two strengths 
must be adopted, two names should be adopted also. Prepara- 
tions are inserted in a Pharmacopoeia to be prescribed by a 
given name, not as examples of prescriptions to be copied in 
detail. 
Mistura creasoti. Creasote Mixture. This is made 
by dissolving sixteen minims of creasote, by the aid of an 
equal quantity of acetic acid, in fourteen fluidounces of wa- 
ter, one of compound spirit of juniper, and one of syrup. 
It should have been left to extemporaneous prescription. 
Plumbi Nitras. Nitrate of Lead. This is introduced 
for the purpose of preparing the iodide of lead, which is used 
to form an ointment by the London, but not the Edinburgh 
College. The London College forms the iodide by means of 
the acetate of lead. 
Pulvis rhei compositus. Compound Rhubarb Powder. 
This consists of a pound of magnesia, two ounces of pow- 
dered ginger, and four of powdered rhubarb, mixed together. 
Unguentum cocculi. Cocculus Indicus Ointment. 
The formula for this ointment is as follows: — " Take any con- 
venient quantity of Cocculus Indicus, separate and preserve 
the kernels, beat them well in a mortar, first alone, and then 
