Principles and practice of operative dentistry . Per Per 51 00 Calcium carbonate Magnesium phosphate 50 It will be seen the amount of organic matter varies considerably be-tween infancy and adult life. Galippe (Journal British Dental Association,1886, p. 361) has a very exhaustive paper on the chemical composition ofthe teeth. Hoppe-Seyler has found in the enamel of the new-born child as muchas per cent, of organic matter, per cent, in the young pig, andin the
Principles and practice of operative dentistry . Per Per 51 00 Calcium carbonate Magnesium phosphate 50 It will be seen the amount of organic matter varies considerably be-tween infancy and adult life. Galippe (Journal British Dental Association,1886, p. 361) has a very exhaustive paper on the chemical composition ofthe teeth. Hoppe-Seyler has found in the enamel of the new-born child as muchas per cent, of organic matter, per cent, in the young pig, andin the fossil rhinoceros per cent. Bibra gives two per cent, of organicmatter in the adult male and five per cent, in the adult female. NASMYTHS MEMBRANE. The origin and function of Nasmyths membrane has furnished matterfor a considerable difference of opinion and much speculation. Tomesand Magitot regard it as a thin covering of cementum, as it is similar toand continuous with the cementum covering the root, lacunee being foundin its Outer layerof columnarIs Inner layerof columnar -Vertical section of human enamel and Nasmyth „ uof what appears to be two layers of columnar epithelial cells. (V. A. Latham.) x 250. lbrane, showing the latter to be composed
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectdentist, bookyear1901
