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 333
ringglass plates have already been explained. Films are seldomquite flat, and it is therefore impossible to get a perfectly sharpnegative in consequence. The bigger the film the more unevenits surface is likely to be; even the most modern devices do notentirely remedy the defect. For the smaller… … Fig. 196.—Film holder. off. After the exposure has been made a shutter is pulled out,and the film is shot forward under the action of a spring intoa storage space, where they remain till they are to be developed.The storage space is sufficient for thirty films. The wholeapparatus is very light and…
Aeronautics
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten07unit-331-223.webp)
