. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. air for some days in a warm place, it disappears or dissolves; if now the liquid be heated to near boiling, a coagulum separates, having all the char- acters of albumin. After removing the albumin, the addition of an acid causes another coagulation, separating a body ^)C)^jClDCZy^l % *na* a»rees in ^s properties with casein. n^flM/]fiyyyii/lfti!M,yMfl c As has been already stated, the albu- minoid bodies form the lining membrane of the youn
. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. air for some days in a warm place, it disappears or dissolves; if now the liquid be heated to near boiling, a coagulum separates, having all the char- acters of albumin. After removing the albumin, the addition of an acid causes another coagulation, separating a body ^)C)^jClDCZy^l % *na* a»rees in ^s properties with casein. n^flM/]fiyyyii/lfti!M,yMfl c As has been already stated, the albu- minoid bodies form the lining membrane of the young cell and are diffused in the dissolved state throughout its liquid con- tents. In those parts of the plant where these bodies accumulate, they are found nearly filling entire cells and series of cells. (e, fig. 7.) According to Hartig (Entwickelungsgeschichte des Planzen Keims) the albuminoids exist in the seed in an organized form, usually in grains that are scarcely to be dis- tinguished from starch by the eye, (A, fig. 8) often, however, in per- fect polyhedral crystals. (Fig. 8, B and C.) This aleuron, as Hartig terms it, is not a pure albuminoid; according to an analysis made from material prepared by him, it contains but per cent, of nitrogen. The aleuron grains dur- ing the life of the plant suffer metamorphosis into starch and other organized matters, of course undergoing radical chemical chan- ges at the same time. While the two great classes of organic proximate elements, just considered, make up the larger share of vegetation, and suffice to show in the most beautiful manner how the single cell represents the whole plant, both structurally and chemically, we should stop short of the object of these lectures did we not consider some other vegetal principles of great importance both to the vegetable and ani- mal economy, which agree with the cellulose group in consisting only of carbon, hydrogen, and oxygen, but differ again from the carbo-hy- drates in the fac
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