Word: film
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Dates: during 1896-1896
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...very sensitive Cramer dry-plate about four inches long and 1.5 inches wide, was put, film side up, into a wooden box, having a close-fitting sliding wooden cover. Upon the sensitive plate were laid two clear glass slips, less than one sixteenth of an inch thick. A space was left between them about four inches long and one half an inch deep. Across the glass slips to hold them in place was put a narrow bar of pine wood five-sixteenths of an inch thick. The wooden cover, three-sixteenths of an inch thick, was then pushed into place...