64 Scientific Intelligence. 
only the details, gave products remarkably uniform in character 
and composition, but still retaining a reducing power equal to 
Os re de 
brittle white powder, showing shining fracture-surfaces, “<_— 
An aqueous solution, containing 10 grms. in 100 a has a sp. ‘or. 
solution increases in reduci ing “power, and becomes constant when 
the amount of sugar present, calculated as dextrose, is equal to 
66 per cent. - ~ dextrin employed. The specific rotat ory power 
is then [a] = . Tostudy the sugar produced, a starch paste, 
made as " ioaking was treated with the extract from 20 grams pale 
malt, and the mixture allowed to stand at 40° to 45° for ab 
hours. It was boiled, cooled, filtered, evaporated to 30 
boiled with 2 “Mikers of alcohol (sp. gr. 0.82), cooled, the sakes 
decanted and set aside. In six days the sides of the "vessel were 
substance were made, some from the mother-liquors, others by 
dialysis and reprecipitation. The products were all alike, had a 
specific rotatory power [a] = + 150, and reduced copper oxide 
equal to 65 per cent. glucose. — gave numbers agreeing 
with the pais C,2H,,0,,. The author believes, point 
two-thirds as great as dextrose, and which appears to be identical 
with Dubrunfaut’s maltose.—Jour. Chem. Soc., I, x, 579, J - 
1872 
extrin is insoluble—filtered the solution, and placed it 
aside. The next day a slight peepuenente appeared, which 1n- 
creased daily for three weeks. The supernatant ‘liquid was 
decanted; the precipitate, washed free from sulphuric aie by 
es feebly by diastase, not colored by iodine, converted into dex- 
rose by heating with ‘dilute sulphuric acid, and having a rotatory 
power nearly double that of dextrose. Agreeing i in all except the 
t omar closely with exten — Bull. Soe., ch. Tl, xviii, 66, 
July 15, G. F. B 
