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crystals

by alfred edwin howard tutton

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...structural units were the chemical molecules, and that while the main lines of symmetry were de- termined by the arrangement of the molecules its details were settled by the arrangement of the atoms in the molecules, is clear to any one who reads his 1784 "Essai" and 1801 " Traite, " and interprets his molecules inUgrantes and ZUmentaires in the light of our knowledge of to-day. Before we pass on, however, to consider the modern development of the real meaning of the law of rational indices, as revealed by recent work on the internal structure of crystals, it will be well to consider first, in the next chapter, a few more essential facts as to crystal symmetry, and the current mode of constructing a comprehensive, yet simple, plan of the faces present on a crystal. CHAPTER VI THE DISTRIBUTION OP CRYSTAL FACES IN ZONES, AND THE MODE OF CONSTRUCTING A PLAN OF THE FACES. IT will have been clear from the facts related ir^ the previous chapters that the salient property possessed by all...

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E-mail:tinkle_nora91@yahoo.com

20 Dec 2010 12:17:12

please put some picture on it

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