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In French. Ex-library. 1893 Imprimerie de l'Universite Imperiale (Moscow), 7 1/8 x 10 1/2 inches tall hardbound, marbled paper-covered boards over tan cloth spine, two title pages, frontispiece portrait of author, 63 engraved textual illustrations, xxviii, 136 pp. plus errata and five full-page plates, three in full-color chromolithography, complete. Large chip from lower tip of front board and crack to lower tip of rear board. Cornell University Library marks to spine. Bookplate, stamps and stickers to front pastedown and free-endpaper. Embossed stamp to title page. Cracking between front pastedown and free-endpaper, with frontispiece and title page barely attached. A scarce first edition copy of this research, useful as a reading copy or as a candidate for rebinding. Bookplate and notation on first title page suggest the book was donated to Cornell by the author's widow. Posthumous publication of the mineralogy research of Prof. M. Tolstopiatow, for 30 years a professor of mineralogy at Moscow University. His favorite subject related to crystallogenesis and the structure of crystals, but a large part of the book is taken up by his observations on the absorption brushes of epidote. The crystals are viewed in ordinary and in polarized light (from the sky or with a nicol), and beautifully colored plates are given of the absorption and interference phenomena seen. The 'primary' or absorption brushes, which depend on the unequal absorption of the two rays, are disposed in the direction of the orthodiagonal of the crystal (epidote), and do not change their position when a nicol placed in front is rotated, there being only a transposition of the colors. The second part of the volume, on the structure of crystals, is very hypothetical, and commences with the assertion that crystals are not homogeneous, but consist of a nucleus and an envelope, the former being regularly constituted, and the latter irregularly - in fact, a sort of accidental growth. ~SP09A~. Seller Inventory # SP09-0841-1235
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