A ha ee ea eae 
46 REPORT OF SCHIMMEL & Co. OCTOBER 1914/ APRIL 1915. = 
compound by separation with soda distilled from 70 to 75° (4mm.) and its odour - 
did not resemble citronellal at all, but rather n-decylic aldehyde. djs. 0,8212; ap + 0°. 
In order to characterize the aldehyde further use was made of its thiosemicarbazone 
which was not known so far, but which is easily obtained by heating 1 cc. of the 
aldehyde with 0,5 g. of thiosemicarbazide and 20 g. acetic acid (80 p.c.) for a short 
time. This mixture, diluted with a little water, is then allowed to stand for several 
hours. The thiosemicarbazone, which crystallizes when the solution cools, melts at 
99 to 100°. Benzene is best used for recrystallization. 
In similar manner the thiosemicarbazones of the following aldehydes were 
recuced:— 
ELS m.p. of the thiosemicarbazones 
m-nonylic aldehyde. jis. gases ea fac 
n-octylic aldehyde ..2.....°-- ......94) toro 
citronellal.. .. i.) nse ee. ee he are 
The aldehyde from the turpentine oil of Pinus Jeffreyi cannot therefore be identical 
with citronellal, but is proved to be n-decylic aldehyde. Possibly small quantities of 
nonylic and octylic aldehydes might also be present in the oil. 
The parts left after separating the decylic aldehyde by means of bisulphite liquor 
smelled of linalool and methylchavicol. B. p. 70 to 75° (4 mm.); diso 0,9008; «) — 10°. 
By means of phenylésocyanate, linalylphenylurethane, m. p: 66°, was obtained from 
this fraction. The conjecture that methylchavicol was present besides linalool, was 
confirmed by an examination after Zeisel, which yielded a strong methoxyl reaction; 
furthermore, by oxidation with permanganate of potash solution, anisic acid, melting 
at 180°, was obtained. The quantity available was not, however, sufficient for a more 
specified proof of methylchavicol. 
We have met methylchavicol before now as a constituent of Pinus oils; for 
instance, it was isolated from a wood turpentine oil, the so-called yellow pine oil, and 
was characterized with certainty by being converted into anethole'). 
The Pioneer of the 18t of May, 1914, prints a paragraph on turpentine production 
in India, according to which modern machinery of French origin has been erected in 
Bhawali (United Provinces) for the production of turpentine. A second plant is contem- 
plated for Lahore. The Forest Department considess Indian turpentine production as 
well capable of being developed to advantage, as the forest areas of the Himalayas 
are abundantly stocked with Pinus longifolia’). But the fact should not be lost sight 
of that, as will be explained further on, the oil is of an inferior quality. 
According to Puran Singh*) a preliminary estimate has shewn that the only Bur- 
mese district, where turpentine production may be carried out to advantage, are the 
southern Shan States. The possibilities as regards transport will be greatly improved 
by the completion of a railway line now in course of construction. 
Assam turpentine oil does not seem to have any future. The Pinus Khasya 
which occurs in the district.forms no extensive forests, the cost of collection is high 
and, moreover, the oil is not as good as the one obtained in Burmah. 
Compared with the forests of Pinus longifolia, Roxb., those of Pinus excelsa, Wall., 
are of minor importance, but the oil is excellent and compares favourably with the 
1) Report April 1910, 106. — 2) Nachr. f. Hand., Ind. u. Landw. 1914, No. 70, p.4. — 4) Note on > 
Turpentines of Pinus Khasya, P. Merkusii and P. excelsa; The Indian Trade Journal 83 (1914), 293. 
