A text book of physics, for the use of students of science and engineering (1918)
Duncan, John, d. 1941, Starling, Sydney George, 1873- · London Macmillan · leaf 830
plied by theAdmiralty.. The magnetic compass has also great importance in the steering Lxm THE MAGNETIC COMPASS 805 of air-craft. An aeroplane compass of the Creagh-Osborne type isshown in Fig. 742. The bowl is of spherical form and is mountedin such a manner as to minimise vibration. The compass… … Fig. 742.—The Creagh-Osborne aeroplane compass. the course by means of the scale on the compass card. The bowlcontains liquid to buoy up the card, part of which consists of ahollow float. The liquid thus takes part of the weight off theagate point suspension, and also helps to damp the vibrations…
Physics
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