206 ON LINIMENTUM SAPONIS. 
spirit, about one-third in weight of extract was procured. 
The inner portion of the cover yielded 26 in 40 grains. 
Our note upon India Opium has been extended beyond 
the limits we had in the first instance allotted to the subject; 
as we proceeded, however, so much information presented, 
not contained in systematic works, that we thought a full 
account would be interesting to the readers of the Journal. 
ART. XLV.— NOTE UPON LINIMENTUM SAPONIS, L. E. D., 
TINCTURA SAPONIS CAMPHORATA, U. S. 
By Joseph Carson, M. D. 
These preparations are closely allied, both as regards 
mode of formation and their employment. The same diffi- 
culties and embarrassments are peculiar to them, and the 
formulae, as given by the authorities in England and this 
country, are by no means satisfactory. From the experiments 
and statements of Mr. Hallows, contained in Vol, viii. No. 
ix. of the Pharmaceutical Transactions, re-published Vol. xxi. 
page 1 78 of the American Journal of Pharmacy, correct ideas 
appeared to be entertained, and, as will appear in the sequel, 
these are by no means novel to our own pharmaceutists. 
Two preparations of soap are directed by our own Phar- 
macopoeia, with the express design of having a fluid or a 
solid consistence, to suit the convenience of the practitioner. 
But one formula is adopted by the hi E. and D. Colleges, 
which, although intended to give a fluid preparation for the 
most part, produces a solid one. " Soap liniment (says Mr. 
Hallows) or opodeldoc is always prescribed by medical men, 
under the impression of its being a liquid ; and the public 
are so accustomed to use it in this form, that if it were 
offered them in the solid state, it would be rejected as use- 
less, or inconvenient for application." British apothecaries 
