24 REPORT OF SCHIMMEL 8 Co, OCTOBER 1915. 
Hop Oil. Schmidt‘) reports on two hop plants cultivated in Carlsberg (“Oregon 4 
cluster” and “New York spaulding English cluster”), the hops of which showed a 
pronounced turpentine odour. By crossing experiments it was proved that the turpentine- 
like aroma was transmissible to from ?/s up to %/4 of the descendant plants. From 
these and several other experiments it would appear as though the hop aroma could 
not be looked upon as being of such transient nature as is generally assumed. 
It may here be called to mind that, according to Rabak?), American hop varieties 
are not exactly famous for fineness of aroma. 3 
Iva Oil. In our Report April 1912 (page 83) we gave a few particulars, on the 
properties and composition of iva oil which can now be completed by publishing the 
constants of an oil we distilled ourselves about a year ago. It was very similar to 
the oil reported on previously: diso 0.9339; npa0o 1.47632; acid v. 5.6; ester v. 24.3; 
ester v. after acet. 86.8; soluble in 0.8 vol. of 80 p.c. alcohol; on more being added, 
paraffin was separated. The yield was 0.41 p.c. The original blue-green colour had 
turned to olive-green in the course of time. 
Oil of Kaempferia Ethelae. The Zingiberacea Kaempferia Kthelae, |. M. Wood, 
grows freely in north-eastern Transvaal; its dried bulb, which is called “Sherungulw”’, 
is said to possess medicinal properties. When distilling 31.8 kg. of these bulbs, E.Goulding 
and O. D. Roberts*) obtained 1.5 p.c. of oil, whereas another distillation, carried out 
in the Imperial Institute in London with a smaller quantity of bulbs, only produced 
1.1 p.c. The oil is a pale yellow, readily mobile liquid of a faintly orange-like odour, 
with a hardly pleasant by-odour reminding of crushed ivy leaves. The oil obtained 
by Goulding and Roberts consisted of 93 p.c. of light, and of 7 p.c. of heavy parts. 
The light oil shewed: dso 0.9437; p20 + 19°47’; acid v. 2.3; ester v. 5.0; ester 
v. after acet. 47.6. It contained dipentene (tetrabromide, m. p. 124°) and perhaps also 
pinene, furthermore cineol (iodol compound, m. p. 112°), traces of free acid (acetic 
- acid?) and phenols of creosote-like odour, linalool (oxidation to citral; citrylidenecyano- 
acetic acid, m.p. 120 to 121°), methylanthranilic acid (m. p. 179°; presumably this 
acid is present in the oil in the form of methylester) and a new ketone CosHog Ou. 
It is contained in the parts boiling above 135° (20 mm.), i.e. 270° (ord. pressure), 
from which it separates in colourless crystals at ordinary temperatures. Recrystallized 
from alcohol it melts at 102° and shows [@]p2o + 198° 20’ in chloroform solution. 
The crystals are colourless to start with, but soon become brown on exposure to the 
air. In concentrated form the ketone is nearly odourless, but dissolved in dilute alcohol 
it smells of crushed ivy leaves. It reacts neither with neutral sodium sulphite nor 
with sodium bisulphite. Attempts at oxidation produced no results; methoxyl or 
ethoxyl groups could not be proved. With hydroxylamine hydrochloride and a slight 
excess of sodium hydroxide, the ketone formed a hydroxylamino oxime of the m. p. 184°, 
which, when shaken with dilute acetic acid, was converted into the oxime m. p. 166°. 
It is readily hydrolyzed with hydrochloric acid. Benzoylation after Schotten- Baumann 
yielded a benzoyl derivative of the m. p. 260°. On boiling with alcoholic N/2 potassium ) 
hydroxide lye, the ketone is converted into an amorphous powder of the m. p. 200°. : 
The heavy part of the oil contains mainly the ketone, and perhaps also some . 
sesquiterpenes. 
1) Wochenschr. f. Brauerei 32 (1915), 109. — Compt. rend. du Lab. de Carlsberg (3) 11, 316; Chem. Zentralbl. 
1915, I. 1212. — *) Comp. Report April 1915, 27. — 3) Journ. Chem. Soc. 107 (1915), 314. — Bull. Imp. 
Inst; 18 (1915), 15. 
