gray's supplement to the pharmacopceia. 23 
and afterwards distilling it from carbonate of baryta. When 
pure it is a dense liquid, having a specific gravity of 1.480, 
and a sweet taste. Its composition is H CP . This is 
chloroform. It is soluble in alcohol, and in this form it is 
usually employed in medicine; the liquid sold as chloric 
ether being a mixture of the product above described, with 
about six or eight parts of rectified spirit." 
[This is not the hydrochloric, or muriatic ether of the 
shops, but the substance now recommended by Dr. Simpson 
as a substitute for sulphuric ether for inhalation,] 
" Ferri et QuiNm CiTRAS. Citrate of Iron and Quinia. 
p. Crystallized citric acid, . 9 parts 
Clean iron filings, . . 3 
Quinia, . . . 1 
Water, . . . q. s. 
Dissolve the acid in twice its weight of water, add the 
iron and apply a gentle heat until combination is effected ; 
then add the quinine, continue the application of heat for 
some minutes, filter the solution and evaporate to dryness ; 
dissolve the residue in distilled water, and evaporate the 
solution with a gentle heat to a syrupy consistence ; spread 
this out on earthen plates and dry it in a stove. When dry 
it separates from the plates in scales." 
[This formula differs from that in use here both in the 
proportion of quinia to citrate of iron, and in the state of 
oxidation of the iron. The most usual proportion is five 
parts of citrate of sesqui-oxide of iron and one part citrate 
of quinia.] 
FuMiGATio Picis LiQuiDiE. Tav fumigation. 
Put one part of tar and four or five parts of water in a 
pipkin, or any convenient vessel, and boil it in the apartment 
of the patient, allowing the vapour to escape in the room." 
Oil of Tar in small quantity is advantageously substituted 
for tar. 
