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THE CABBAGE FLY. Rural Econ. Com. Sut-Dept. (for Control of 
Pests) [Petrograd] , 4 pp. 1919. [in Russian. Abstract in 
Rev. Appl. Ent. (A)9: 553. 1921.] 
V/atering with emulsions of quassia and soap is advocated 
as a remedy for the cabbage fly (Phorbia brassicae ) on cruciferous 
plants. 
ADRIAN and HOREAUX . ^ . (?) 
DE LA qU'ASSINE, SA PRJ!pARATION SOUS FORiMES AMORPHE ET CRISTALLIS2!E. 
Repert. Pharm. [n. s.] 11: 246-50. 1883. [Abstract in Amer. 
Jour. Pharm. 56: 98-100. 1884.] 
Thin shavings of Q,uassia amara wood are exhausted with boiling 
water, with the addition of 5 g. of potassium carbonate per kilogram 
of quassia. The liquor is concentrated to a soft extract and the 
extract suspended in hot 90° alcohol. After standing for a short 
time, the alcohol is decanted, and the process repeated twice. The 
alcoholic liquour is allowed to stand 24 hours, the liquid then 
decanted, and sulphuric acid diluted with 90° alcohol (l: 10) added 
until a precipitate is throvsm down. The liquor is filtered, milk 
of lime added (l2 to 15 g. ;per kilogram of wood or 4 to 5 g. of 
caustic lime) , and after some hours the liquor'is again filtered. 
_^^ It is neutralized -by a current of carbon dioxide and again filtered. 
The alcohol is then distilled off, leaving about 8 g. -of the amorphous 
qaassiin of Adrian per kilogram of wood. 
If crystalline quassiin is desired, the distillation is stopped 
while some alcohol remains, the liquid filtered t;o remove resin, 
and the rest of the alcohol then removed. The quassiin, which 
crystallizes on cooling, is puri'fied by r.e'cry$tallization from 
alcohol.' About 1.25 to 1-.5 g. of quassiin per kilogram of quassia 
is obtained. 
Additional uncrystallizable quassiin may be obtained from 
the mother liquor and wash alcohol of the first crystallization 
by extracting with chloroform. 
Crystallized quassiin is white, very soluble in chloroform, 
soluble in about 90 parts of cold absolute alcoholy in 35 to 40 
■parts of 90° alcohol, scarcely soluble in ether, and soluble in 
about 300 parts of hot water, from which it crystallizes on cooling. 
Uncrystallizable quassiin is very soluble in absolute alcohol, 
more soluble in ether than crystallized quassiin, and less soluble 
in water. 
