PHARMACEUTIC NOTICES. 
293 
These ingredients must be perfectly dried by expelling the 
water of crystallization, then reduced to powder, and finally 
mixed together. Enclose in dry bottles, with good corks 
adapted to them, and seal with wax. If there be the least 
moisture contained in the mixture, carbonic acid will be ge- 
nerated, and bursting of the bottles will follow. Dose. — A 
tea spoon full in half a tumbler of water, drank in a state of 
effervescence. 
Mother Ointment, Onguent de la Mere Thecle, so called 
from having been first used by an old nun of that name, and 
known otherwise by the terms. Brown Plaster, Brown 
Ointment, &c. is an emollient and suppurative preparation, 
much employed in France as an application to boils, &c. Its 
reputation and use there, being co-extensive with the domestic ' 
application to boils in this country, of a salve made of equal 
parts of brown soap, and much used in the nursery. It is thus 
prepared: 
Take of Olive oil, lbs. ij. 
Semivitrified oxide of lead, lb. i. 
Put these substances in a metallic vessel over a gentle fire: 
mix and stir incessantly with a wooden spatula until the 
mixture carbonizes and assumes a dark brown colour, disen- 
gaging a thick black smoke. This stage of the operation 
requires particular care, as the mixture puffs up with violence, > 
and is highly inflammable. To this add the following mix- 
ture, previously melted and strained. 
Lard, lbs. ij 
Suet, lb. j. 
Yellow wax, lb. |. 
Black resin, lb. ^. 
When the whole is incorporated, pour the mixture into a 
proper mould, made by simply turning up and securing the 
VOL. III. — NO. IV. 37 
