Annual Report of the Board of Regents of the Smithsonian InstitutionThe Institution, 1921 |
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Results 1-3 of 37
Page 140
... tube could slide , thus allowing for the change of azimuth . The tube of the astrographic telescope was circular in section , and could rest in any position in the V's ; for convenience it was adjusted so that the directions of right ...
... tube could slide , thus allowing for the change of azimuth . The tube of the astrographic telescope was circular in section , and could rest in any position in the V's ; for convenience it was adjusted so that the directions of right ...
Page 179
... tube will meet all of these requirements , with the exception that the power output of vacuum tubes as at present constructed is limited to not more than a few hundred watts per tube . The requirements of a modulator for radio telephony ...
... tube will meet all of these requirements , with the exception that the power output of vacuum tubes as at present constructed is limited to not more than a few hundred watts per tube . The requirements of a modulator for radio telephony ...
Page 184
... tube which has been designated as a regulator tube . At the lower limit of the operating speed range , namely , 4,000 revolutions per minute , the filament of this regulator tube operates at a temperature which gives practically no ...
... tube which has been designated as a regulator tube . At the lower limit of the operating speed range , namely , 4,000 revolutions per minute , the filament of this regulator tube operates at a temperature which gives practically no ...
Contents
Bureau of American Ethnology | 17 |
Report on the United States National Museum | 25 |
EXECUTIVE COMMITTEE AND REGENTS | 100 |
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