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ANTISEPTICS. 889 amounts, but it is likely that the proteid directly connected with glycocoll will be found to be highly melassigenic.We have been in the habit of associating the so-called gums or viscous bodies in cane juice with the cellulose or non-nitrogenous constituents of the plant, but we may have to modify this view in the presence of a gelatin-yielding proteid peculiar to sugar-cane and allied plants.
CHARLES F. MABERY. strength as those ordinarily used in manufacture. Care must be taken, however, that the solvents are free from all matter not volatile at ioo°C.
The Stereochemistry o j Indigo.-The last paragraph of this paper (This Journal, Decembernumber, 1907, p.1743,) in which the structures of thetwo diacetyl indigo whites are discussed on the spatial hypothesis, assumes that both compounds possess the ketone structure. If both rearrange to the tautomeric enol forms, it should be pointed out that there would still be two stereoisomers (cis and trans) which it would not be possible to resolve into optically active isomers.
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