- 76 - 
This method of adulteration has acquired fairly large dimensions, but as 
both bodies can be easily detected, the persons who practise this method will 
soon be compelled to look about for some other means." 
Rose Oil, German. The rose plants of our Miltitz fields have 
been trimmed considerably during the spring of this year, for horticultural 
reasons, and their yield has consequently been only one fourth of the 
normal. 
The gathering of the flowers was much delayed by the inclement 
weather, but was finally accompKshed under exceptionally favourable 
conditions, and the result was a faultless flower-material. In conse- 
quence of orders received, a considerable portion was worked up for 
rose -pomade and rose-water, and only a few kilos of rose oil have 
been distilled, of which the bulk had also been sold in advance. For 
this reason we can only offer small quantities of the latter, and that 
without engagement. 
Oil of Kue. C. Mannich^) has produced a few derivatives of 
the ketones present in oil of rue. Methyl nonyl ketone, which forms 
the principal constituent of the oil, is converted on reduction into the 
corresponding secondary alcohol, methyl nonyl carbinol (boiling point 
120^ at 14 mm pressure). Its acetyl and benzoyl derivatives boil res- 
pectively at 147 — 149° (42 mm) and 197,5 — 200° (15 mm pressure). 
Its oxalate melts at 34,5°, the phenyl carbamate at 36,5 — 37°. 
Sulphuric acid splits off water from the ketone, with formation of 
2-undekylene CHg-CH: CH-CgH^y (boiling point 192 — 193°) and 
2-undekanyl ether [CH3 • CH(C9 H^9)]2 O, boiling point 198 — 200^. 
2-Undekylene absorbs 2 atoms bromine; the dibromide boils at 145 
to 146°, at 9 mm pressure. When treated with potash liquor, the 
bromide is converted, with liberation of 2 molecules hydrobromic, acid 
into 2-undekin CH3 • C • C • CgH^^, an unpleasantly smelling liquid of 
the boiling point 199 — 201° (81,5° at 10 mm pressure). Methyl 
nonyl ketone, when treated with hydrochloric acid gas, splits off water 
and yields a liquid product C22H^3 0C1; from this results, upon dis- 
tillation in vacuo, the ketone 
HoC 
^ >C:CH.C0.C9Hic) 
-^1 9 ^0 
of the boiling point 214 — 216° at 10 mm pressure. 
The methyl heptyl carbinol produced in a manner analogous to 
that of methyl nonyl carbinol, has the boiling point 193 — 194° (87,5^ 
at 10 mm pressure); the 2-nonylene CH3 • CH : CH • C^H^g obtained 
from it boils at 147 — 148°. The oximes of both ketones yield on 
strong reduction the corresponding amines. 2-Undekylene amine boils 
^) Berliner Berichte 35 (1902), 2144. 
