Atkinson, Philip. [from old catalog] · New York, The Century co. · leaf 268
ading producedby the relative thickness of material, impossible to obtainin a photograph, which shows only the surface; the figurescut in relief showing dark shades in the thicker partsrand shades of varying lightness in the thinner parts,especially those representing the faces and upper partsof… … Fig. 110. It is an important feature of this process that not onlyprominent objects, as bnllets and shot, can be located byit, bnt also foreign substances so minute as to escape or-dinary observation. This is well illustrated by Fig. Ill,which shows a ladys hand, taken by fifteen seconds ex-posure.…
Electricity
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