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 214
alloon-ing, it may be as well to describe it a little more fully. Themethod is due to an officer of the Bavarian Balloon Corps, namedvon Weinbach, who communicated his ideas to Dr Vollbehrof Halensee. An instrument, called the microphotoscope, wastherefore designed. It consists of two parts, which… … Fig. 119.—Barograph, or recording barometer. be capable of moving in slots, either up and down, or to the rightand left. Microphotographs, which represent photographicreductions of maps published on a larger scale, are taken oncelluloid films, and mounted in position between thin sheets ofglass,…
Aeronautics
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