How? or, Spare hours made profitable for boys and girls (1887)
Holbrook, Kennedy · New York, Worthington co. · leaf 158
upon a stand placed two or three feetfrom the window, and thus make it possible for the spec- CAMERA OBSCURA. 153 tator to view the scene in its normal condition. Shouldyou be desirous of having the whole sweep of the horizonat your command in the darkened room, a simply con-structed frame-work is… … Fiq-5 movable lens, which can be readily taken from its socketif desired ; b, the hole in the bottom of the bracket, whichshould correspond to a larger hole in the shelf d, uponwhich the bracket rests, and can be easily turned in anydirection desired. This hole should be large enough toallow the…
Handicraft · Amusements
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