ScienceJohn Michels (Journalist) 1958 |
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Стр. 843
... important development , in 1937-39 , of the " klystron " tube , which proved capable of performing , at micro- wave frequencies , many of the tasks ex- pected of the conventional vacuum tube at lower radio frequencies . The beginning of ...
... important development , in 1937-39 , of the " klystron " tube , which proved capable of performing , at micro- wave frequencies , many of the tasks ex- pected of the conventional vacuum tube at lower radio frequencies . The beginning of ...
Стр. 1213
... important in the field of chemistry . " " This remark gave the conversation a grave and almost an emotional turn . Upon leaving Berzelius , Dumas could not help thinking of the age of the great man who , born in 1779 , was now exactly ...
... important in the field of chemistry . " " This remark gave the conversation a grave and almost an emotional turn . Upon leaving Berzelius , Dumas could not help thinking of the age of the great man who , born in 1779 , was now exactly ...
Стр. 1220
... important works are all masterpieces in comparison with the very best work of a host of lesser men . As here employed , the words " mere quan- tity of output " imply only that some of the contributions of our greatest chem- ists are ...
... important works are all masterpieces in comparison with the very best work of a host of lesser men . As here employed , the words " mere quan- tity of output " imply only that some of the contributions of our greatest chem- ists are ...
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I | 9 |
Hawaii book review of Flora Hawaiiensis | 11 |
Infrared absorption spectra of steroids | 11 |
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