The Encyclopedia Americana: A Library of Universal Knowledge, Količina 8Americana corporation, 1931 |
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Stran 269
... crystal is heated , one end of the axis becomes negatively electrified and the other end posi- tively . This fact was observed in tourmaline crystals as early as 1762 by pinus and the same property is shown by calamine , boracite ...
... crystal is heated , one end of the axis becomes negatively electrified and the other end posi- tively . This fact was observed in tourmaline crystals as early as 1762 by pinus and the same property is shown by calamine , boracite ...
Stran 271
... Crystals ' ( London 1930 ) ; Bragg , W. T. and W. L. , X - rays and Crystal Structure ) ( rev : ed . , New York ( 1924 ) ; Honess , A. P. , ' Nature , Ori- gin and Interpretation of the Etch Figures of Crystals ) ( New York 1927 ) ...
... Crystals ' ( London 1930 ) ; Bragg , W. T. and W. L. , X - rays and Crystal Structure ) ( rev : ed . , New York ( 1924 ) ; Honess , A. P. , ' Nature , Ori- gin and Interpretation of the Etch Figures of Crystals ) ( New York 1927 ) ...
Stran 272
... crystal form in elementary work are determinations of " system , " recognition of type symbols , approxi- mate angle measurements and interpretation of crystal descriptions , and in more advanced work are exact measurements of angles ...
... crystal form in elementary work are determinations of " system , " recognition of type symbols , approxi- mate angle measurements and interpretation of crystal descriptions , and in more advanced work are exact measurements of angles ...
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