ScienceJohn Michels (Journalist) 1943 |
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Стр. 12
... means of producing for the first time continuous high frequency oscillations by means of a thermionic tube . He filed applications on this invention in the latter part of 1913 and a patent was is- sued to him on October 6 , 1914. In ...
... means of producing for the first time continuous high frequency oscillations by means of a thermionic tube . He filed applications on this invention in the latter part of 1913 and a patent was is- sued to him on October 6 , 1914. In ...
Стр. 197
... means of collecting references to papers in a narrower field is essential . This is usually accomplished by a card file of some sort . For a number of years the present writer has been clipping from two of the sec- tions the abstracts ...
... means of collecting references to papers in a narrower field is essential . This is usually accomplished by a card file of some sort . For a number of years the present writer has been clipping from two of the sec- tions the abstracts ...
Стр. 499
... means of germicidal lamps installed in schoolrooms . This study , which extended over a five - year period and included observations on a large number of children in three schools , showed that the incidence of measles , in particular ...
... means of germicidal lamps installed in schoolrooms . This study , which extended over a five - year period and included observations on a large number of children in three schools , showed that the incidence of measles , in particular ...
Содержание
VOL | 1 |
CASE G W Engineering Colleges and War 79 | 10 |
Health Service A SEIDELL | 14 |
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Academy acid action activity Agriculture American Association animals annual antigen appointed Army award Biol biological biotin Brill's disease Bureau carbarsone catalase cells cent chairman Chem chemical chemist chemistry Chicago College Columbia University committee Company contributions Council courting flights diet digitalis director discussion disease Division effect elected endemic typhus engineering enzyme experimental fact factor field folic acid Harvard human important increase industrial infection Institute interest investigations Jour Journal laboratory lectures liver material mathematics Medal Medical School Medicine meeting ment metabolism method Museum National natural nitrogen nutrition obtained Office organic organic chemistry p-aminobenzoic acid physics plant present president problems production professor protein rats recent RECENT DEATHS reported scientific scientists serum Smithsonian Institution Building Society solution species sulfonamide synthetic rubber technical thiamin tion tissue United versity virus vitamin Washington York