Chemistry and Physies. 295 
would replace the ethyl by amyl, forming thus the amylsulpho- 
carbonate. This they find by experiment is equally efficacious 
with the other, me even less injurious action on ae and is far 
cheaper. Moreo it may be made easier. If concentrated 
potassium ne erie eae be agitated with crude hes alcohol, 
and carbon disulphide be added, the whole mass becomes warm 
ind deposits potassium amy sulphocarbonate, in a form best 
suited for use. It may be caring ping in solution or better 
mixed with superphosphate. As the authors estimate 
at at the present cost of amyl Bore ‘Ctasel oil) in Vienna, it 
n be made for $15 a hundred weight. It is not only usefial to 
exterminate the phylloxera, but also 1 many other root parasites of 
plants.— Ber. Berl. Chem. Ges., viii, 802, 955, June, awa es 
Separated by means of a syphon. The residue on distillation gave 
12 to 15 grams of volatile liquids, which after rectification 
boiled between 72° and 77°, and consisted of methyl and or 4 
alcohols, the latter consituting two thirds. By examining the 
fruit at various stages of growth, the author infers that as ripen- 
ing approaches, the ethyl compounds | gradu ae diminish, being 
converted into more condensed a while the methyl oer 
pounds remain constant. The o =: pane mentioned A oe 
Similar result. —Liebig’s ge 38 pee 344, June, 1 
G. F. B. 
7. On Arbutin.—Htastwerz and Hapermann have made a 
u 
authors find, however, that the body thus obtained is not pure 
hydroquinone, but is a mixture of this and its methyl derivative, 
methyl -hydroquinone ©,H, nee isomeric with saligenin 
C,H, ae OH . Hence they assign to arbutin the formula 
C, oH, 40,, and express its splitting by ferments, as follows: 
C,,H,,0,, +(H,0), = C,H,» +0, HO, t(CyH 1206) 
Arbatin: stort 
One hundred of onan ia 19° 7 a he aieivindiis) 22:5 5 
boi 
a i Mri and 64°7 sugar.—Liebig’s —— _— 
