METHOD OF OBTAINING GLVJCINE.

205

Its specific gravity is 2.967. It is soluble in alcalies and theircarbonates, and in all the acids except the carbonic and phospho-ric, and forms with them saccharine and slightly astringentsalts. It is exceedingly soluble in sulphuric acid used to excess.It is fusible with borax, and forms with it a transparent glass. Itabsorbs one-fourth of its weight of carbonic acid. It decom-poses sulphate of alumine. It is not precipitated by the hidro-sulphurets nor by prussiate of potash, but by all die succinates.Its affinity for the acids is intermediate between magnesia andalumine.

METHOD OF OBTAINING GLUCINE.

To obtain glucine reduce some beryl to an impalpable powder,fuse it with three times its weight of potash, and dissolve themass in muriatic acid. Separate the silex by evaporation andfiltration, and decompose the remaining fluid by adding carbo-nate of potash; re-dissolve the deposit when washed in sulphuricacid, and by mingling this solution with sulphate of potash, sul-phate of alumine will be obtained which crystallizes.

Then mix the fluid with a solution of carbonate of ammonia,which must be used in excess; filter and boil it, and a whitepowder will gradually fall down, which is glucine.