Airships past and present, together with chapters on the use of balloons in connection with meteorology, photography and the carrier pigeon . 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 such balloons, asthey are very liable to catch fire spontaneously. The methodsthat were employed in making the old varnishes are unfortunatelyno longer known.
Airships past and present, together with chapters on the use of balloons in connection with meteorology, photography and the carrier pigeon . 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 such balloons, asthey are very liable to catch fire spontaneously. The methodsthat were employed in making the old varnishes are unfortunatelyno longer known. Several other things have also been used formaking the coverings airtight; but nothing better is known thanlinseed oil varnish, or rubber solution. One square foot ofponghee silk, as used for French military balloons, withfive coats of varnish weighs 1*2 ounces, and one square foot of 182 AIESHIPS PAST AND PEE
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Keywords: ., bookcentury1900, bookdecade1900, bookpubl, booksubjectaeronautics
