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WjiHL, E. (120) 
3EMPRJHG DSR SPIiTl^vIILBEl^ Mitt. Landw. Bakt. u. 
Pflanzenschutzsta. Wion, 13 pp. ii, d, [Abstract in 
Hcv, Appl. Snt. (A) 8: ?^G2, 191:^0.] 
The measures advocated for the control of the rod spider 
include the application of quasoia sprays, 
WIGGSHS, A. (121)^ 
mSEH EEN QUASSIT. LioMgs Aoii. Chen. 21: 40-48, 1837. 
The author prefers the name "Quacsit" to quassin, as "being 
indicative of the indifferonco of the materipl to acids. His 
method of preparation is as iollo^7s: 
The cut-up wood is repeatedly "boiled \7ith v/o.ter. The 
filtered decoction is cvaporrted to three-fourths 
the weight of the wood used, stirred with a measured quantity of 
slaked lime, allowed to stand for a dcy with frequent shrking, and 
then filtered. The filtered liquid is evaporated to dryness and 
the residue extracted with 80-to 90-pcrcent alcohol, 'yjhen the 
alcohol is distilling off r^id the solution evaporated, to dryness, 
there is left a "bright-yellow, ciyrtallinc, deliquescent, "bitter- 
tasting mass, which dissolves readily in water <?jad alcohol. To 
separate the quassit pure from this mass, it is repeatedly dissolved 
in the smrllcst possi"ble quantity of alcohol, a large quantity of 
ether is added, and. the liquid is filtered from the material 
preciiiitated by t he ether aiid evaporated. This i !? repeated until 
the quassit remains colorless, Finally the alcohol-ether solution 
is poured into a little water and allowed to evaporate spontaneously 
in ord^er to o'otnia crystals, 
Q^iassit forms very small, white, opaque prisms. The presence 
of water is nec.csscjry for ciystrJ-lization, There is ali/avs a. 
part which docs not crystallize, Quassit is sta'ole in air, odor- 
less, ond very "bitter-tasting. It is difficultly solu"ble in v/ater 
(100 parts at 12 dissolve 0,45 part), "but its solutions are rlnost 
un'bearehly "bitter. Its solu"bility in water is increased "by salts 
e^\6. easily soliitle organic substances. Aqueous solutions of quassit 
are precipitated by tannic acid, but not by iodine, chlorine, 
sublimate, iron solutions, or lead acetate, Quassit is only slightly 
so].uble in ether, rlcohol being ohe best solvent. The solutions 
are colorless and neutral. Dilute acids and alkcJ-ios increase 
the solubility in water, but do not react, Concentrrted sulphuric acid 
dissolved quassit without colora.tion or decomposition in the cold, 
but charring occurs UT)on heating. Cold rdtric odd ( sp, gr, 1,350) 
dissolves quassit readily cud. apparently without chrnge, but on 
heating red f-umes ere evolved rnd the quassit is converted to oxalic Qcid. 
