Airships past and present, together with chapters on the use of balloons in connection with meteorology, photography and the carrier pigeon (1908)
Hildebrandt, A. (Alfred), b. 1870, Story, W. H. tr · New York, D. Van Nostrand company · leaf 202
osely woven throughout, and that it should be in all places ofthe same strength, special machines having been designed fortesting its resisting power. All envelopes made of silk or cottonrequire to be varnished in some way. The oldest method was tocoat it with rubber solution, as proposed by… … FlG. 108.—Making balloon envelopes in Eiedingers factory, inAugsburg. colouring it with a yellow paint. A better plan is to varnish theenvelope with linseed oil, though it must be admitted that ithas the unpleasant property of becoming very sticky in hotweather. Great care must be taken in storing…
Aeronautics
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