CAMPHORIFEROUS ESSENTIAL OILS, ETC. 
17 
tion, added to cleanliness of appearance in a shop bottle, which, 
with no sediment in the bottom of it, is always ready for im- 
mediate use. Sometimes the dregs adhere so tenaciously to 
the bottle in ordinary maceration of a gum resin, as to be 
with difficulty separated. 
Mr. Musculus, Pharmacien at Soultz, Lower Rhine, has 
published a process for making Kermes's mineral and golden 
sulphuret of antimony, by means of the method of displace- 
ment, proving that it may be applied to mineral substances. 
ART. II. — OBSERVATIONS ON SOME OF THE CAMPHOR- 
IFEROUS ESSENTIAL OILS, AND ON THE RESINS 
EVOLVED FROM SOME OF THE VOLATILE OILS, BY 
THEIR REACTION WITH SULPHURIC ACID. By Wil- 
liam Procter, jr. 
Two varieties of camphor are known to exist in Oriental 
commerce; one derived from the Laurus camphora of China 
and Japan; and the other from the Dryobalanops camphora of 
Borneo, a large tree, in which the camphor is found secreted 
in oblong cavities near the centre of its trunk. These cavi- 
ties, in the young tree, are said to be occupied by an oily 
fluid, from w T hich, as the tree advances in age, the camphor is 
deposited. 
A specimen of this camphorous fluid was brought from the 
East Indies by Dr. Burroughs; a portion of which was ob- 
tained through Dr. Carson, at whose solicitation the follow- 
ing experiments were undertaken. 
Oil of camphor (as the above mentioned fluid is called) 
is of a straw color, having the usual consistence of volatile 
oils. Its odor is camphorous, very permanent, and much 
resembles that of camphor wood: it has a pungent, disagree- 
vol. iv. — no. I. 3 
