206

PROOFS OF THB PROPERTIES OF GLUCINE

SECT. II.

EXPERIMENTAL PROOFS

OF

THE PROPERTIES OF GLUCINE-

Although glucine resembles alumine in many of its properties ,it possesses others which are different.

Experiment I.

ITlhsSOLVE separately equal quantities of glucine and aluminein nitric acid to perfect saturation. The salt which results fromthe combination of the glucine with nitric acid does not crystal-lize, but forms on drying, a kind of ductile paste; its taste ishighly saccharine and afterwards astringent. The solution ofthis mass when mixed with tincture of galls produces instantlya brown-yellow precipitate.

On the contrary-, the taste of the nitrate of alumine is notsweet, and its solution does not produce any precipitate with thesame re-agent.

Ex-periment II.

To the solution of nitrate of glucine add some oxalate of pot-ash, no change will take place even after some days.