Annual Report of the Board of Regents of the Smithsonian InstitutionThe Institution, 1921 |
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Сторінка 255
... color with copper . The notion of something like chemical combina- tion of the copper leads to the study of the ... color- less on cooling , but " strikes " on reheating , can be prevented from giving any color of copper at all by more ...
... color with copper . The notion of something like chemical combina- tion of the copper leads to the study of the ... color- less on cooling , but " strikes " on reheating , can be prevented from giving any color of copper at all by more ...
Сторінка 256
... color on exposure to radium for a period during which others develop no color . In making the latter , the conditions in the furnace were arranged for complete reduction of the manganese dioxide . In making the former , as little ...
... color on exposure to radium for a period during which others develop no color . In making the latter , the conditions in the furnace were arranged for complete reduction of the manganese dioxide . In making the former , as little ...
Сторінка 258
... color altogether . What there is is a somewhat violet blue in the case of the potash glass , a rather lighter and more violet blue in the soda glass , and a still lighter pink violet in the lithia glass . This nearly pink glass goes to ...
... color altogether . What there is is a somewhat violet blue in the case of the potash glass , a rather lighter and more violet blue in the soda glass , and a still lighter pink violet in the lithia glass . This nearly pink glass goes to ...
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Bureau of American Ethnology | 17 |
Report on the United States National Museum | 25 |
EXECUTIVE COMMITTEE AND REGENTS | 100 |
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