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the oinchona alkaloids and their derivatives (total about 24) • Quini- 
dine sulfate showed marked mothproofing properties* Pieces of wool 
treated with it withstood moth attack for 4 years •— Anonymous (30); 
Jackson and Wassell (219) • 
Solutions consisting of cinchona alkaloids dissolved in naphtha 
were of value when the fabrics were treated by thorough drenching*— 
Back and Cotton (46 , p« 466). 
Quinine was one of the alkaloids having some mothproofing value, 
but it was insufficient for practical use. The salts of quinine (sul- 
fate, oxalate, salicylate, and sulfosalicylate) were useless as moth- 
proofing agents* Oleic acid combined with quinine was less effective 
than oleic aoid alone,— Minaeff and Wright (281 , p. 1190) • 
In laboratory tests cinchonine used as a dust killed 36 percent of 
the coaling moth larvae tested, while quinine alkaloid killed only 15 • 5 
percent*— McAlister and Van Leeuwen (249 ) • 
Extracts of dried cinchona bark were not repellent to the Japanese 
beetle. —Met zger and Grant (277 ) * • 
Konate, a proprietary compound containing cinchona alkaloids, was 
very effective in Petri dish tests against larvae of the webbing clothes 
moth.— Britton (69, p. 252). 
"When alkaloids and their salts were fed to silkworms, the following 
percentages were dead in 3 days: Cinchonine 60, cinchonine hydrochloride 
and cinchonine sulfate 0, cinchonine salicylate 30, and cinchonidine 15, 
8-hydroxyquinoline 0, 2-quinoline 40, isoquinoline 60, quinoline salicy- 
late 30, quinoline tartrate 0* and quinoidine 15. There was much feed- 
ing in most of the tests.— Ginsburg and Granett ( 161 ) . 
Quinine sulfate applied as a spray against adult mosquitoes was 
much inferior to the standard mosquitocide.— Wats and Singh ( 421 ) • 
There are at least nine patents in which the cinchona alkaloids 
and their derivatives are used in mothproofing.— Roark ( 333 , pp. 8, 39, 
86; 335 , p» 73), and Roark and Busbey ( 346 , pp. 16, 73). 
Comments by reviewer .— It thus appears that the cinchona alkaloids 
have little or no practical value as insecticides except as mothproof- 
ing agents. 
COFFBA ARABICA L. Coffee. 
COFFBA LIBERICA Hiern. 
The toxic principle in the coffee berry is the feebly basic alka- 
loid caffeine. This elkaloid is also found in tea and other plants, 
but the papers dealing with caffeine will be discussed here* 
