Annual Report of the Secretary of War, Volume 4U.S. Government Printing Office, 1887 |
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Página 194
... indicates the wind direc- tion . The fan - blades , generally eight in number , are adjusted at such an angle that ... indicated by vanes established on the galleries of towers , the roofs of buildings , the sides of hills , or under ...
... indicates the wind direc- tion . The fan - blades , generally eight in number , are adjusted at such an angle that ... indicated by vanes established on the galleries of towers , the roofs of buildings , the sides of hills , or under ...
Página 197
... indicate the direction of the wind vane ; the other provides for a similar accuracy in the time scale . The latter is obtained ... indicated by the trace . The oscillations shown by the anemoscope sheet suggest a method of testing the ...
... indicate the direction of the wind vane ; the other provides for a similar accuracy in the time scale . The latter is obtained ... indicated by the trace . The oscillations shown by the anemoscope sheet suggest a method of testing the ...
Página 302
... indicating wheels might be so arranged that they at once indicate knots per hour without reference to the table ... indicated by the line ab , then this motion acts to produce a head - wind , which will be represented by ad . If the ...
... indicating wheels might be so arranged that they at once indicate knots per hour without reference to the table ... indicated by the line ab , then this motion acts to produce a head - wind , which will be represented by ad . If the ...
Índice
PREFACE | 5 |
INTRODUCTION | 7 |
General history and development of thermometers | 13 |
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accuracy adopted air thermometer altitude anemometer angle angular angular velocity apparatus apparent approximately atmospheric atmospheric pressure axis azimuth balance beam barograph barometer boiling boiling-point bulb capillary cistern cloud coefficient computed constant convection correction corresponding cups cylinder density determined dew-point diameter direction distance effect equation error eter expansion experiments Fahrenheit fluid formula friction given gives gravity heat horizontal hygrometer inches increase instrument latter length liquid lower manometer means measured meniscus mercurial column mercurial thermometers meteorological method Metric System millimeters mometer motion moving Negretti and Zambra nephoscope normal observations obtained ordinary perature plane plate quantity radiation radius ratio reading records reduced Regnault resistance rotation scale shows Signal Service square standard standard gravity stem surface temperature tension ther tion unit upper vapor vertical vessel viscosity volume weight whence whirling whirling-machine wind vane wind velocity zero