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ARCTIC AEROPLANING. Siemens and Gait. Cloth, bds. Ss. 6d. ANGELO'S DESERT IN A DIRIGIBLE. New edition, revised. 5s. 9d. VAUGHAN'S PLANE RACING IN CALM AND STORM. 2s. 6d. HOFMAN'S LAWS OF LIFT AND VELOCITY. With diagrams, 3s. 6d. DE VITRE'S THEORY OF SHIFTING BALLAST IN DIRIGIBLES. 2s. 6d. SANGER'S TEMPERATURES AT HIGH ALTITUDES. 4s. HAWKIN'S FOG AND HOW To AVOID IT. 3s.
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