298 
TINCTURA SAPONIS CAMPHORATA. 
prescribes proof spirit, and Pereira asserts that this tincture 
does not spoil, to his knowledge, when prepared with good 
kino, noticing, at the same time, the observation I have 
quoted, and attributing the circumstance to the probable 
employment of an inferior article, overlooking the plain fact 
of the difference in strength of the spirit used. Without 
entering into any disquisition as to the rationale of the 
advantage of the difference in the menstruum recommended 
to be used in the preparation, I will merely submit the fact 
to you, which I have tested by a year's trial, and which 
seems to me to be of sufficient practical importance to entitle 
it to a place in your Journal, through which it may be the 
means of restoring to general use a valuable preparation for 
which we have no exactly adequate substitute. 
I am, gentlemen, very respectfully, 
Benj. Canavan. 
699 Broadway, N. Y., Aug. 31, 1849. 
ART. LXX.— TINCTURA SAPONIS CAMPHORATA. 
By George Ross ; M. D. 
p Various suggestions have been given of late, as regards 
the best mode of making this preparation. I have met 
with the same difficulties, owing to its coagulation in cold 
weather, and hence, for some time past, have substituted the 
following, in lieu of the officinal preparation: 
R Alcohol, - O.v. 
Castor oil, - - gj v . 
Water of ammonia, - - giv. 
Camphor, ... ^iv. 
Oil of rosemary, - - gj. 
Mix the castor oil and water of ammonia together, then 
