ScienceJohn Michels (Journalist) 1958 |
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... important development , in 1937-39 , of the " klystron " tube , which proved capable of performing , at microwave frequencies , many of the tasks expected of the conventional vacuum tube at lower radio frequencies . more The beginning ...
... important development , in 1937-39 , of the " klystron " tube , which proved capable of performing , at microwave frequencies , many of the tasks expected of the conventional vacuum tube at lower radio frequencies . more The beginning ...
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 quantity of output " imply only that some of the contributions of our greatest chemists are much ...
... important works are all masterpieces in comparison with the very best work of a host of lesser men . As here employed , the words " mere quantity of output " imply only that some of the contributions of our greatest chemists are much ...
Содержание
Infrared absorption spectra of steroids | 11 |
K and J F Winn Renal | 12 |
Insecticide broadcast use of 462 effect | 25 |
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