326 ESSENTIAL OIL OF MATRICARIA PARTHENIUM. 
hydrogen, 10*37. Some oil prepared in 1847, and which 
had spontaneously deposited a small quantity of camphor, 
was dried over chloride of calcium and analysed ; it gave 
77-96 per cent. C, and 10'60 H. 
The oil of Matricaria is evidently a mixture ; even that 
which has been submitted to great cold still contains a con- 
siderable quantity of camphor. It began to boil at about 
310°, but the thermometor rose rapidly to 400°, and the 
greater portion of the oil distilled over between 400^ and 
428°, leaving a coloured residue. The last half of the 
product, which had been collected betv/een 394° and 428°, 
deposited, when submitted to a very low temperature, 
a large amount of camphor, which was separated. The 
oil was distilled several times over caustic lime, collecting 
the products at separate intervals ; but no oil was obtained 
with a constant boiling-point. All the portions collected 
between 392° and 428° always afforded camphor on cooling, 
and sometimes to such an extent that the product of distil- 
lation congealed to a soft mass in the neck of the retort. 
We will enumerate a few of our analyses. I. is of oil 
collected between 310° and 334° ; II. between 338° and 
and 356'^; III. between 390° and 420°; and IV. between 
420° and 428° 
L II. III. IV. 
Carbon . . . 86-46 85-77 77-02 76-92 
Hydrogen . . 11 58 11-22 10.24 10-37 
The volatile oil of Matricaria most probably contains, 
besides camphor, a hydrocarbon of the formula A% and 
an oil containing more oxygen than camphor. — Chem, Gaz., 
from Jour, de Phar. et de Chim, 
