Annual Report of the Board of Regents of the Smithsonian InstitutionThe Institution, 1921 |
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Сторінка 182
... production of several thousand of the airplane wireless tele- phone sets in the brief space of a few months involved many prob- lems of an extremely unusual and difficult nature . As an example may be cited the production of the vacuum ...
... production of several thousand of the airplane wireless tele- phone sets in the brief space of a few months involved many prob- lems of an extremely unusual and difficult nature . As an example may be cited the production of the vacuum ...
Сторінка 217
... production of propellants was 632,504,000 pounds , an amount practically equal to the combined production of the British and the French . During the same period we made over 375,000,000 pounds of high explosives . The sulphuric acid ...
... production of propellants was 632,504,000 pounds , an amount practically equal to the combined production of the British and the French . During the same period we made over 375,000,000 pounds of high explosives . The sulphuric acid ...
Сторінка 218
... production was raised from 670,000 pounds upon our entry into the war to 13,000,000 pounds a month 19 months later , and of this a considerable proportion was produced synthetically from benzol . Picric acid , which is made from phenol ...
... production was raised from 670,000 pounds upon our entry into the war to 13,000,000 pounds a month 19 months later , and of this a considerable proportion was produced synthetically from benzol . Picric acid , which is made from phenol ...
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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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