Scientific American Supplement, No. 586, March 26, 1887 by Various
page 59 of 134 (44%)
page 59 of 134 (44%)
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will hesitate to acknowledge his equal.--_Journal of the Association of
Engineering Societies_. * * * * * PRINTING LANTERN PICTURES BY ARTIFICIAL LIGHT ON BROMIDE PLATES FROM VARIOUS SIZES. By A. PUMPHREY. [Footnote: Read before the Birmingham Photographic Society. Reported in the _Photo. News_.] There can be no question that there is no plan that is so simple for producing transparencies as contact printing, but in this, as in other photographic matters, one method of work will not answer all needs. Reproduction in the camera, using daylight to illuminate the negative, enables the operator to reduce or enlarge in every direction, but the lantern is a winter instrument, and comes in for demand and use during the short days. When even the professional photographer has not enough light to get through his orders, how can the amateur get the needed daylight if photography be only the pursuit in spare time? Besides, there are days in our large towns when what daylight there is is so yellow from smoke or fog as to have little actinic power. These considerations and needs have led me to experiment and test what can be done with artificial light, and I think I have made the way clear for actual work without further experiment. I |
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