— 86 — 
Schindelmeiser^) succeeded in isolating from Siberian pine needle 
oil, which is very closely allied in its physical and chemical properties 
to Canadian hemlock oil and American oil from the needles of Picea 
nigra^ by freezing out the first runnings, a strongly la^vorotatory cam- 
phene of the melting point 40°, whose molecular rotatory power 
amounted to — 94° 30^ Its hydrochloride melted at 150°; a nitroso- 
chloride could not be produced. Schindelmeiser considers his 
camphene as identic with the not yet pure hydrocarbon of Z el in ski 
and Alexandroff. 
L. Bouveault and G. Blanc 2) report on two new hydrocarbons 
isomeric with campholene and camphene. According to the authors 
there is obtained from dihydro - ^ - aminocampholene ^) by means of 
methyl iodide and potassium hydroxide in alcoholic solution, the qua- 
ternary trimethyldihydro-/?- campholene ammonium iodide CgH-j^jCHg* 
N (0113)3 1, in beautiful crystals which melt at 270° with decomposition. 
Silver oxide converts the compound into the corresponding hydrate, 
which, like the chloride and the sulphate, dissolved in water with 
extraordinary rapidity. The hydrate is an indistinct crystalline mass. 
On distillation it is split up into trimethyl amine and the hydrocarbon 
09H^g, trimethyl- 1, i, 2-methylene-3-cyclopentane. In consequence 
of the simultaneous formation of the tertiary base Og H;,^5 OH2 N (0113)2 
the yield of hydrocarbon is but small. This body, a mobile liquid 
with a turpentine-like odour, boils at 138° to 140°, and readily 
resinifies on exposure to the air. Contrary to the isomeric campholene, 
it does not form a solid derivative with hydriodic acid. Potassium 
permanganate oxidises it into the ketone 2, 3, 3 -trimethyl cyclopentanone 
of Noyes"^): 
OH3OH3 OH3 OH3 
OH — 0H3-|-0^ = H^O-fOOg -f OH2 OH — OH3 
= OH2 OH2 — 00 
The base, which is also formed in the distillation of the hydrate, 
is a mobile liquid with a fish-like odour, and the boiling point 191° 
to 192°. Its hydrochloride has the melting point 166° to 167^. 
1) Chem. Ztg. Rep. 27 (1903), 73; Chem. Centralbl. 1903, I. 83$. 
Compt. rend. 136 (1903), 1460. 
^) Bull. soc. chim. III. 23 (1900), 107. 
^) Berichte 33 (1900), 54. 
