SELECTED ARTICLES. 
ART. XXXIII. — OBSERVATIONS UPON THE FORM, OR AP- 
PARENT STATE, WHICH THE COMBINATIONS OF CER- 
TAIN BODIES WITH CAMPHOR ASSUME, AND UPON 
THE PROPERTIES WHICH THESE BODIES POSSESS OF 
MASKING, DIMINISHING, OR EXALTING ITS ODOR. By 
M. Planche. 
The simple and well known method of our associate M. 
Garot, for coating pills in such a way as to mask their odor, 
has induced me to recur to experiments made some time 
before, with another end in view; as a secondary result of one 
of them, was the disappearance of the odor of camphor in a 
mixture where this body was associated with another, having 
an agreeable and sweet smell. 
It is already evident, and the title of this notice sufficiently 
indicates it, that what I have to say has nothing in common 
with the method of my colleague. 
The question in magistral pharmacy which, in the first 
place, I proposed to myself, was this : The more or less con- 
siderable softening which accompanies the reaction between 
camphor and assafoetida, (a phenomenon familiar to all practi- 
tioners of pharmacy,) is it common to all gum-resins, resins, 
and other analogous substances? From the first experiment 
the question became complicated with a collateral circum- 
stance, which appeared to me so interesting as to induce me 
to separate it, and thus render its developement more easy. I 
mixed equal weights of camphor and assafoetida, both in pow- 
der, and I perceived that besides an instantaneous softening 
of the mass, the odor of the camphor was considerably 
