Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 443
glitz.) 958 PHOTOGRAPHY: ITS MARVELS. [Sept. out the land of the enemy; and by a clockarrangement the camera can also be made toregister signals flashed by mirrors betweenbodies of troops stationed many miles apart. In the navy,photographs aretaken by hoistingthe camera to thetop ofa mast, stay-ing… … THE LITTLE MINISTER. the foot of the mast witha pair of field-glasses,observes the reflection inthe mirror, and at theproper time makes theexposure. Photogrammetry —the art of measuring byphotography — is now apart of the education ofthe surveyor. In ofiicial surveying and registering of lands…
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