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APPLICATION OF ORGANIC CHEMISTRY TO PERFUMERY. 
from the air and becomes NO 4 , which, passing through the liquid, 
becomes nitric acid and nitrous gas as before ; and thus nearly 
the whole the nitrous fumes or gas are reconverted into nitric 
acid. 
In Ecarnot's patented process for recovering the nitric acid, he 
fills his regenerating vessels with a porous substance, such as pu- 
mice-stone, supplying the oxygen by a blowing-machine, a flow 
of steam being brought from a boiler. — Chemical Gazette, March 
15, 1852. 
APPLICATION OF ORGANIC CHEMISTRY TO PERFUMERY. 
From a Letter written by Dr. Hofmanx to Prof. Liebig. 
The beautiful investigations of M. Cahours upon the oil of Gual- 
theria procumbens, which have made us acquainted with the nature 
of this compound, so much used in perfumery, appears not to have 
been lost sight of in the arts. 
The arrangement of the oil of winter-green in the group of the 
compound ethers, could not do otherwise than direct the attention 
of the manufacturers of perfumery to this extensive class of bodies, 
the number of which is still further daily increased by the active 
energy devoted to the field of organic chemistry. The remarkable 
fruity odor of many of these ethers had not been overlooked by 
chemists ; but it was reserved for practical men to make the selec- 
tion and ascertain the proportions in which certain of these com- 
pounds resembled in so great a degree the aroma of particular 
fruits, that we almost feel ourselves led to the idea, that these very 
compounds are the cause of the odor of the fruits in question, and 
that they would be found in them, if the processes were followed 
on a sufficiently large scale. 
The artificial production of aromatic oils for commercial pur- 
poses has only been carried on for the last few years ; but although 
the process of fabrication is so new, yet it appears to be already 
in the hands of several distillers, some of whom make tolerably 
large quantities. The jury were enabled to satisfy themselves of 
this, in their examination of the products belonging to this depart- 
