Annual Report of the Board of Regents of the Smithsonian InstitutionThe Institution, 1921 |
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Сторінка 239
... glass , and it was hoped that there might be experiments . The production of glass is difficult to illustrate efficiently in the course of a lecture . It will , therefore , only be dealt with very briefly and generally before turning to ...
... glass , and it was hoped that there might be experiments . The production of glass is difficult to illustrate efficiently in the course of a lecture . It will , therefore , only be dealt with very briefly and generally before turning to ...
Сторінка 241
... glass is so perfectly solid as to give no indication of move- ment under stress if tested by sufficiently delicate means . This ques- tion of permanent stability of form ... glass and metal joint cooled , the glass would GLASS JACKSON . 241.
... glass is so perfectly solid as to give no indication of move- ment under stress if tested by sufficiently delicate means . This ques- tion of permanent stability of form ... glass and metal joint cooled , the glass would GLASS JACKSON . 241.
Сторінка 250
... glass has to be cooled before becoming opal depends on the concentration of the particular opal - producing compound which is held in solution in the very hot glass . Opal glasses produced with phosphates " strike , " generally speaking ...
... glass has to be cooled before becoming opal depends on the concentration of the particular opal - producing compound which is held in solution in the very hot glass . Opal glasses produced with phosphates " strike , " generally speaking ...
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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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