. The antelope and deer of America : a comprehensive treatise upon the natural history, including the characteristics, habits, affinities, and capacity for domestication of the Antilocapra and Cervidae of North America . Pronghorn; Deer; Mammals. 1 TITS' â OF AK IXCH X 60. - OF AN ISOH X 296. Thin eection of a prowing horn of an antelope, cut perpendicular to the surface. Pig. 1 shows the general structure under a low power. Fio. 2, more highly magni- fled, shows the cell structure. The letters refer to the same parts in each figure. a. The connective tissue continuous with the periosteum of t
. The antelope and deer of America : a comprehensive treatise upon the natural history, including the characteristics, habits, affinities, and capacity for domestication of the Antilocapra and Cervidae of North America . Pronghorn; Deer; Mammals. 1 TITS' â OF AK IXCH X 60. - OF AN ISOH X 296. Thin eection of a prowing horn of an antelope, cut perpendicular to the surface. Pig. 1 shows the general structure under a low power. Fio. 2, more highly magni- fled, shows the cell structure. The letters refer to the same parts in each figure. a. The connective tissue continuous with the periosteum of the core of the horn. 6. The papillse, very large and irregviar. c. The cell growth npon the papillae. d. The outer portion, seen to be made np of the flattened and desiccated cells of the layer beneath, already converted into horn. skin. If this appears to want uniformity of structure, a critical examination shows that this results from a change of form of the cells of which it is composed, which become flattened and consol- idated by compression, and by evaporation, or by becoming dried up. Thus is the epidermis converted into true horn. Chem- ically, the constituents of epidermis and of horn are nearly iden- tical. The true horn at d is but the flattened and dried up cells which were formed upon the papillse b, and were pushed up by new cell formations beneath them, till they reach their final form. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Caton, John Dean, 1812-1895. Boston : Houghton Mifflin
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectmammals, bookyear1881
