— 47 — 
The ketone had therefore been oxidised chiefly into caproic acid. 
Unfortunatel};, ethyl amyl ketone is difficult to approach by synthetic 
process. For this reason, we were as yet unable to compare it, with 
regard to its properties, with the ketone from lavender oil. The 
ketone has up to the present not been detected in any essential oil, 
and its discovery is therefore all the more interesting. The quantity 
contained in lavender oil may amount to at most 0,2 per cent. In 
our next Report we hope to be able to supply the physical constants 
which are still wanting. 
d-Borneol. This alcohol was isolated from fractions boiling 
between 85^ and 92° (7 to 8 mm), whose physical constants lay between 
the following limits: specific gravity 0,9069 to 0,9223; optical rotation 
Qj) — 3^ 49' to — 2° 35^; saponification number 213 to 237. The 
fractions were saponified with alcoholic potassa, and the alcohols of 
the boiling point 96 to 103 (13 mm) thereupon obtained were esterified 
with phthalic anhydride. From the solution of phthalic ester salt, 
freed from oil by extraction with ether, resulted on saponification an 
alcoholic mixture of a pronounced borneol odour. By fractionating at 
ordinary pressure a slightly dextrogyrate oil of the boiling point 
205^ to 220'' was separated off, which did not solidify in a freezing 
mixture, but which, on oxidation with Beckmann's mixture, yielded 
large quantities of camphor. The latter was driven off with steam 
from the oxidation-liquid, and obtained as a solid body of the melting 
point 175° (after subliming). Its oxime melted at 118° to 119°. This 
proves the presence of d-borneol in lavender oil, and the borneol occurs 
in it not only in the free state, but also combined with acetic acid. 
Attempts to produce the phenyl urethane of the borneol from 
the above-mentioned fraction boiling at 205° to 220°, were not 
successful, — possibly in consequence of an admixture of geraniol. 
In the portions of the above-mentioned fractions which could not 
be esterified with phthalic anhydride, and in others of a slightly higher 
boiling point, we have repeatedly endeavoured to detect terpineol. 
Although the portions used for the examination had an odour re- 
minding of terpineol, the latter could not be identified either as a solid 
body, or by means of its phenyl urethane. 
Geraniol. We had previously already shown that geraniol is 
present in lavender oil, but up to the present it was not known whether 
geraniol occurs as a free alcohol and as ester, or only in one of these 
forms. We have now been able to prove that both forms are contained 
in the oil. For the purpose of detecting free geraniol, we treated a 
considerable quantity of oil of the boiling point 89° to 93^ (6 to 7 mm) 
with phthalic anhydride. From the solution of the phthalate, which 
had been frequently extracted with ether, there resulted, after saponi- 
fication, an alcohol of the boiling point 225° to 232°, which had the 
