MISCELLANY. 
175 
dissolve the camphor, which solution should be filtered. The present 
tincture of camphor of the Pharmacopoeia of London, contains one ounce 
more of that substance, and does not harmonize so well with my two 
other ingredients as the weaker preparation. 
The three ingredients thus prepared, every medical man should keep 
always ready at hand, in well-stoppered glass bottles, so as to be able to 
make extemporaneously, a counter-irritating lotion of any requisite 
strength, according to the nature of the case requiring that application on 
extraordinary occasions. But for the ordinary purposes detailed in my 
work, it will be better to keep both a milder and a stronger ammoniated 
, lotion ready prepared for use. 
The milder Ammoniated Lotion. — Assuming the quantity of lotion desired 
to be divided into eight parts, then the proportions of the ingredients will 
stand thus : 
A — four-eighths, 
B — three-eighths, 
C — one-eighth. 
The stronger Ammoniated Lotion. — If the quantity desired be also divided 
into eight parts, then the proportions of the ingredients run as follow : — 
A — five-eighths, 
B — two-eighths, 
C — one-eighth. 
Although the changes of proportion here may be deemed trifling, yet 
the strength of the lotion is such, that I never employ it, except in cases 
of apoplexy, and for the purpose of cauterization. 
Directions in mixing the Ingredients. — A and B are gradually mixed 
together. The mixture becomes opalescent and somewhat turbid, and a 
peculiar, highly agreeable, ethereal smell is given out, different from the 
individual odor of either ingredient, although the extreme pungency of the 
ammonia be still discernible, 1 have strong reasons to believe that, at 
this point of the operation, some particular change takes place, which im- 
parts to the mixture of the two ingredients some of its valuable peculiarities 
as a counter-irritant, described in my work ; but what that change is, it is 
not my business to enter upon in this place : suffice it to say, that in a great 
number of experiments, made with the ingredients separately, (for each of 
them acts as a counter-irritant on the skin,) and with them combined, the 
effects were uniformly different; those in the former case being found 
unequal to the production of those complete results which 1 trust I have 
justly promised to the profession. Ammonia alone (however strong) will 
not give rise to the effects I have described, though it has often stopped 
internal pain, and produced small little Misters ; but never has it succeeded 
in almost immediately producing a full vesication, as I have seldom failed 
to produce with the two ingredients mixed together, particularly after the 
third ingredient has been added. 
