— 42 — 
In continuation of his earlier work, Chapman^) reports on 
recent examinations of hop oils from flowers of different origin The 
physical constants agreed sufficiently well: the specific gravity of the 
oil from Bavarian hops of the year 1894 was 0,8676 {~d) or 0,8645 
(^y, the oil from flowers of 1901 showed 0,8403 and 0,8357 re- 
spectively, and Californian oil from flowers of 1899, 0,8639 and 0,8610 
respectively. The molecular rotatory power of the Bavarian oil was 
-[-0,30° and — 0,08°; that of Californian oil — 0,20^. On fractional 
distillation in vacuo there was collected in the lowest boiling fraction, 
in addition to small quantities of dipentene, a very light myrcene-like 
hydrocarbon C^oH^g, which on hydration according to Bertram and 
Walbaum yielded an ester with a lavender- like odour. In the middle 
fractions linalool could be detected, and also a volatile acid C9 H^g Og, 
in the form of ester, probably isononylic acid. The presence of a 
geranyl ester was moreover suspected. The highest boiling portions 
consisted almost exclusively of the sesquiterpene humulene. The oxi- 
dation of hop oil with chromic acid mixture yielded in addition to 
volatile acids (acetic acid and homologues), also succinic acid and 
asymmetric dimethyl succinic acid. The hydrocarbons myrcene and 
humulene represented more than 80 per cent, of the oil. 
Jasmine Oil ^*Schimmel & Co.". The use of this product, 
which was introduced by us mto commerce as the first artificial flower- 
oil, is constantly increasing. There can be no doubt that on the one 
hand the natural products of the jasmine-flowers can be improved in 
a marked degree by the addition of artificial oil of jasmine, and the 
artificial oil on the other hand by adding natural jasmine oil; our own 
oil of jasmine has from the first contained large quantities of the latter. 
It requires no further proof to demonstrate the enormous advantage 
which the perfumery-industry derives from this product. 
Oil of Juniper-berries. The harvest of juniper -berries in 
Upper Italy has given such an uncommonly rich yield, that the smaller 
crop, which is said to be the result of the Hungarian harvest, is more 
than counterbalanced. Our supplies come decidedly cheaper, and allow 
of a reduction in the quotations of our own two distillates from berries 
whose excellent qualities we specially desire to emphasise. 
Lavender Oil. The reports on this year's lavender- distillation 
are not quite so unfavourable as was at first expected. In the lower- 
lying districts of the departments Alpes- Mari times, Hautes- Alpes, 
and Drome, the yield is even characterised as favourable, and the 
producers themselves estimate it at a third higher than last year. Only 
in the high altitudes the distillers complain about the small yield from 
^) Journ. Chem. Soc. 86 (1903), 505. Pharm. Rev. 21 (1903), 155. 
