— 1 8 ■— 
as the quantity of this aldehyde obtained up to the present was still 
very small. But in any case the aldehyde is identic with decylic 
aldehyde, whose semicarbazone melts at 102°. We obtained an- 
other aldehyde from a fraction boiling at 11 mm between 100*^ 
and 112°. This yielded with semicarbazide a solid semicarbazone, 
which, after repeated recrystallisation from alcohol, melted at 200° 
to 201°, and which was found to be the semicarbazone of cumic 
aldehyde. When this was heated with dilute sulphuric acid, an 
aldehyde was regenerated, which does not differ in its odour from 
cumic aldehyde. The melting point of the semicarbazone of the 
cumic aldehyde isolated from oil of cumin also lies at 200°. 
At this moment we are still engaged on the further examination 
of the essential oils of Acacia Farnesiana^ and of Cassie RofnamCj and 
it is our intention, after a sufficiently thorough study, to report on 
this subject in detail. 
A German Patent (No. 139635) has been granted to us for the 
use of the newly discovered bodies in the production of artificial oil 
of cassie flowers. 
Cedarwood Oil, Atlas (Libanol Boisse). An exceptionally 
lively interest has been shown for this novelty, and at various 
clinical institutions examinations are now in progress on the thera- 
peutical value of this product. If they confirm the favourable results 
obtained in the French hospitals, the use of this oil may become very 
ext'cnsive. 
More recent information of a practical character has not been 
received from France. 
Emilien Grimal^) reports in two communications the results of 
an examination made by him in our laboratory, of the essential oil 
of the Atlas cedar, Cedi^us atlantica, a variety of Cedriis Libani. The 
oil examined had a peculiar odour, which is chiefly due to a ketone 
CqH^^O detected in the oil. The physical constants of the oil were as 
follows: d = 0,9508; nj)2oo = 1,51 191; [«]d20° = + 60° 32'. The 
oil dissolved in 8,5 parts of 90 per cent, alcohol, and only in 115 parts 
of 70 per cent, alcohol. Acid number 1,16; saponification number 6,92; 
saponification number after acetylation 33,84. 
In distilKng the oil, 80 percent, passed over between 270° and 295°. 
800 g of the oil were fractionated ; in the portions first passing over, 
small quantities of acetone were detected, and about 40 g were ob- 
tained of a fraction boiling between 180° and 215°, which contains 
the ketone CqH-^^O. This ketone yielded a semicarbazone of the 
^) Compt. rend. 135 (1902), 582 and 1057. 
