A popular guide to minerals : with chapters on the Bement Collection of minerals in the American Museum of Natural History, and the development of mineralogy . APOPHYLLITE Poonah, India Bement Collection, American Museum of Natural History. STILBITE IcelandBement Collectioi., American Museum of Natural History DEVELOPMENT OF MINERALOGY 251 mineral construction of rocks. As Prof. Judd points out his epochmaking- memoir On the microscopical structure of crystals—amemoir, which, though neglected, and even ridiculed at the time,laid the foundation of microscopical petrography,—and in doing so,wide
A popular guide to minerals : with chapters on the Bement Collection of minerals in the American Museum of Natural History, and the development of mineralogy . APOPHYLLITE Poonah, India Bement Collection, American Museum of Natural History. STILBITE IcelandBement Collectioi., American Museum of Natural History DEVELOPMENT OF MINERALOGY 251 mineral construction of rocks. As Prof. Judd points out his epochmaking- memoir On the microscopical structure of crystals—amemoir, which, though neglected, and even ridiculed at the time,laid the foundation of microscopical petrography,—and in doing so,widened enormously the sphere of influence of mineralogy fromwhich it borrowed so much. In 1909 appeared Wallerants elaborate and advanced discussionof crystal structure, growth, combinations, polymorphism, isomor-phism; (Cristallographie; deformation des corps cristalUsees;gronpements; polyniorphisme; isomorphisme). This work presentsthe advanced views of mineral science, where analysis, directed bymathematical conceptions, and guided by chemical determinations,and assisted by experiment, enters actually within the mechanismof the forming crystal and describes its growth. Optical studies were being constantly refined and advanced,a
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmineral, bookyear1912
