. Coast artillery drill regulations, United States Army, 1909. ts it is essential also that this setting be made at thedesignated instant. BABOMETEE. 756. Both the mercurial and aneroid barometers are hungin the meteorological station. The aneroid barometer isalways used for determining atmospheric data, the being used to adjust the aneroid. To use the mer-curial barometer for ordinary work involves too much lossof time. DEFLECTION BOAKD. (See also mortar deflection board.) 757. The deflection board is an adding machine by meansof which the corrections for travel in azimuth
. Coast artillery drill regulations, United States Army, 1909. ts it is essential also that this setting be made at thedesignated instant. BABOMETEE. 756. Both the mercurial and aneroid barometers are hungin the meteorological station. The aneroid barometer isalways used for determining atmospheric data, the being used to adjust the aneroid. To use the mer-curial barometer for ordinary work involves too much lossof time. DEFLECTION BOAKD. (See also mortar deflection board.) 757. The deflection board is an adding machine by meansof which the corrections for travel in azimuth during theobserving interval, for travel in azimuth during the time offlight, and for wind and drift, are added algebraically. Thetotal azimuth correction to be made on the gun arm, or the AZIMUTH INSTRUMENT Trur-nion Clar>->p Screw, Tye Le Cye Rec /Yoke Cap Telescope Trunnion fbcu5ir-)g Knob Ly, Eve Rece Adapter Crosswire Holder andAdjusting Screws —Objective andObjective Cell Worm Adjusting Screw Worry-\ Box ElccentriiCrank Vorm BovAdjusting 5crew. -Worm SotWorm Screw Dix Crank Fig. 3. 82013—00. (To face page Q <O CD o UJ Q
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectartillerydrillandtac
