. Physiological botany; I. Outlines of the histology of phænogamous plants. II. Vegetable physiology. Plant physiology; Plant anatomy. 46 THE VEGETABLE CELL IN GENERAL. protein crj-stal-like bodies, and the protein basis or stroma in â which all of these are held. The protein basis sometimes, if not alwaj's, appears to consist of two substances, differing in their solubility in water, and com- mingled as granulose and cellulose are in starch- granules. While the pro- tein basis is generallj' verj' soluble in water (not per se, but owing to the pres- ence of potassic phos- phate), the protein
. Physiological botany; I. Outlines of the histology of phænogamous plants. II. Vegetable physiology. Plant physiology; Plant anatomy. 46 THE VEGETABLE CELL IN GENERAL. protein crj-stal-like bodies, and the protein basis or stroma in â which all of these are held. The protein basis sometimes, if not alwaj's, appears to consist of two substances, differing in their solubility in water, and com- mingled as granulose and cellulose are in starch- granules. While the pro- tein basis is generallj' verj' soluble in water (not per se, but owing to the pres- ence of potassic phos- phate), the protein crj'stals are insoluble, or onlj- slightly affected by it, usually becoming more or less swollen. After solution of the protein basis has taken place, a delicate membrane is left behind, and through this transparent film tlie protein crystals are clearly seen. The relatiA'e amounts of protein basis and protein crystals varj- wideh'; in some cases the former appears to be wanting, Ihe latter whollj" filling the interior of the mem- brane. Such crystals appear in potato-tubers in the form of. small cubes. Protein crystals of great beauty are easily dem- onstrated in the endosperm of the common Brazil-nut (Ber- tholletia). Very instructive phenomena are presented when different sections of the seed are subjected to the following reagents; (1) osmic acid (one per cent solution) ; (2) heematoxylin Pig. 14. Single iirotein grnnnles treated as in Pig. 12. '{o. (Pfeffer.) Fig. 15. Protein granules tVnm Silybum marifinum. In the cell on the left they have crystalline contents; in that on the right, globoids This section was taken from the cotyledons of a dormant seed, and after treatment with mercuric chloride in alcohol was placed in water, ^nfl, (PfefTer.) Fig. 16. The mesh of the ground mass of the cell has been cleared by dilute potassic hydrate and hydrochloric acid, n = nucleus. ^\'^. (Pfeffer.) Fig 17. Cells from the cotyledons of a germinating seed which has just rupture
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