PHARMACY. 
Hydrargyrus purificaUis, Lond. purified 
quicksilver. 
Acetis bydrargyri acetite, Edin. of quick- 
silver. 
Murias bydrargyri, Edin. Lond. muriate 
of quicksilver, coi rosive sublimate. 
Submurias bydrargyri, Edin. calomel, 
Lond. 
Submurias bydrargyri prajcipitatus, Edin. 
mild muriated quicksilver, Lond. 
Calx bydrargyri alba. Loud, white preci- 
pitate. 
Hydrargyrns calcinatus. Dub. Lond. cal- 
cined quicksilver. 
Oxydura bydrargyri rubrum, Edin. red 
precipitate. 
Subsulpbas bydrargyri flavus, Edin. vi- 
triolated quicksilver, Lond. 
Sulpburetum bydrargyri nigrum, Edin. 
Ktbiops mineral, turpeth mineral. 
Hydrargyrum sulpburatum nibrum, Lon. 
Dub. factitious cinnabar. 
Acetis plumbi, Edin. acetite of lead, sugar 
of lead. 
Aqua litbargyri acetata, Lond. extract of 
lead. 
Cerussa acetata, Lond. acetated ceruse. 
Stanni pulvis, Lond. powder of tin. 
Oxydnm zinci, Edin. oxide of zinc, cal- 
cined zinc. Lond. 
Carbonas zinci, Edin. impurus prsparatus, 
prepared calamine. 
Oxydnm zinci impuruni prreparatum, 
Edin. prepared tiitty. 
Sulphas zinci, Edin. vitriolated zinc, 
Lond. 
Tbe antimonial powder of the London 
College is supposed to be nearly tbe same 
with the celebrated nostrum of Dr. James, 
the composition of which was ascertained 
by Dr. Pearson of London, to whom we 
are also indebted for the above formula. 
By burning sulphuret of antimony and 
shavings of hartshorn in a white heat, the 
sulphur is entirely expelled, and the anti- 
mony is oxydized, while the gelatine of the 
hartshorn is destroyed, and nothing is left 
but phosphate, of lime, combined with a 
little lime. Therefore the mass which re- 
sults is a mixture of oxide of antimony and 
phosphate of lime, which corresponds, at 
least, as to the nature of the ingredients, 
with James’s powder, which, by Dr. Pear- 
son’s analysis, was found to consist of 43 
phosphate of lime, and 57 oxide of anti- 
mony. Another excellent chemist, M. 
Chenevix, has lately proposed a method of 
forming tlie same combination in the humid 
way, with the view of obtaining a prepara- 
tion always similar in its composition and 
properties. He has led to this proposal by 
considering the uncertainty of the applica- 
tion, and the precarious nature of the agency 
of fire, by which means a variable portion 
of the oxide of antimony may be volatalised, 
and that which remains may be oxydized in 
various degrees. 
M. Chenevix, therefore, proposes to prer, 
pare a substitute for James's powder by 
dissolving together equal weights of sub- 
muriate of antimony and of phosphate of 
lime in the smallest possible quantity of 
muriatic acid, and then pouring this solution 
gradually into water sufficiently alkalized 
with ammonia. For the reason mentioned 
in the preceding article, it is absolutely 
necessary that the muriatic solution be 
poured into the alkaline liquor. By an 
opposite mode of procedure, the precipitate 
would contain more antimony at first, and 
towards the end the phosphate of lime 
would be predominant, and the antimony 
would be partly in the state of a submuriatc. 
The phosphate of lime is most conveniently 
obtained pure by dissolving calcined bone 
in muriatic acid, and by precipitating it by 
ammonia. If the ammonia be quite free 
from carbonic acid, no muriate of lime is 
decomposed. M. Chenevix also found 
that his precipitate is entirely soluble in 
every acid which can dissolve either phos- 
phate of lime or oxide of antimony sepa- 
rately, and that about 0.28 of James’s pow. 
der, and at an average 0.44 of the pulvis 
antimonialis of the London Phannacopoeia 
resist the action of every acid. 
Class VI. Oka Fixata. Fixed Oils. 
Tliese oils are improperly denominated 
expressed, which is their usual characteristic 
name, as in some instances they are ob- 
tained without expression, and in other in- 
stances expression is employed to obtain 
volatile oils. The Edinburgh college have 
therefore distinguished these ditferent classes 
of oils by the terms fixed and volatile, which 
accurately characterize them. 
Fixed eil is formed in no other part of ve- 
getables than in their seeds. Sometimes, 
although very rarely, it is contained in the 
parenchyma of the fruit. Of this, the best 
known example is the olive. But it is 
most commonly found in the seeds of 
dicotyledonous vegetables, sometimes also 
in the fruit of monocotyledonous plants, as 
the cocos butyracea. It has various degrees 
of consistency, from the tallow of the 
croton sebiferura of China, and the butter 
