Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 368
Fixing. ture attained the desired tone. The plate was then washedin clean water, and finally dried evenly and quickly over aspirit lamp. Fig ?2q r -I … Gilding; or Toning. This operation added to the strength and beauty of thepicture, and also served to protect the surface of the plateto a great extent against the action of gases. 346 EXPERIMENTAL SCIENCE. The finished picture was protected by a cover glass, andthe edges of the glass and plate…
Physics · Lantern projection · Electric apparatus and appliances
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