Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 447
r any details of the dress show very plainlyin the negative, the exposure has been too long;while too little contrast between sky and profilemeans that a longer exposure is needed. Many of my readers are doubtless familiarwith velox or other gas-light papers, and knowthat these come in soft and… … PHOTOGRAPHIC SILHOUETTES. using a mask of black paper the size of yourprinting-frame, with an opening in the centerjust large enough to include the portion of theimage you wish to print. If you expose to gas-light about half as long as for an ordinary nega- ign.] NATURE AND SCIENCE FOR YOUNG FOLKS…
Children's literature
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