Chemical News and Journal of Industrial Science, Tom 144,Wydanie 3758Chemical news office., 1932 |
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Strona 257
... present limit of atomic number 92. In 1922 Coster and Hevesey in Copenhagen discovered hafnium . Priority was disputed . by Urbain of Paris who claimed to have found it in 1911-12 through spectrum analysis . Spectrum analysis played a ...
... present limit of atomic number 92. In 1922 Coster and Hevesey in Copenhagen discovered hafnium . Priority was disputed . by Urbain of Paris who claimed to have found it in 1911-12 through spectrum analysis . Spectrum analysis played a ...
Strona 258
... present in platinum ores and in such minerals as columbite . From these sources and by a most compli- cated series of treatments , for details of which their original papers must be con- sulted , they obtained a product in which Berg ...
... present in platinum ores and in such minerals as columbite . From these sources and by a most compli- cated series of treatments , for details of which their original papers must be con- sulted , they obtained a product in which Berg ...
Strona 261
... present figure which passed the tests of experts on November 10-15 , 1931 . Meanwhile progress had gone on with the construction of the Observatory and the telescope mounting . The mounting for the telescope was designed and executed by ...
... present figure which passed the tests of experts on November 10-15 , 1931 . Meanwhile progress had gone on with the construction of the Observatory and the telescope mounting . The mounting for the telescope was designed and executed by ...
Spis treści
The Story of the Perkins Reflector | 260 |
Decline in U S Phosphates Output | 266 |
Mohlers Test for Benzoic Acid Edward T Illing B Sc F I C | 269 |
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