lron wheels moving along rails 16 meters ( feet) ln length. A gigantic water tank 15 meters ( feet) in length 2 meters ( feet) in breadth and meter ( feet) in height having a total capacity as high as the paper was developed by night in ihe open air. Be fore developing the picture the exposed paper fitted with a protecting cover was laid over the slats of turned it dipped the lower part of the paper into the developing liquid. The light portions were especially were checked by means of iced acetic acid solutions. After first interrupting the developing process by projecting
lron wheels moving along rails 16 meters ( feet) ln length. A gigantic water tank 15 meters ( feet) in length 2 meters ( feet) in breadth and meter ( feet) in height having a total capacity as high as the paper was developed by night in ihe open air. Be fore developing the picture the exposed paper fitted with a protecting cover was laid over the slats of turned it dipped the lower part of the paper into the developing liquid. The light portions were especially were checked by means of iced acetic acid solutions. After first interrupting the developing process by projecting iced acetic acid on the photograph by means of a hand pump the paper was conveyed into an acetic acid bath where the clearing process was completed after twenty minutes' time. The picture after an in tense rinsing was transferred into the fixing bath where it remained three-quarters of an hour. After remained for about eight hours while a continuous consumption of water used in washing the print was After the water was drawn off the picture was stretched out on wooden bars attached to the upper edge of the tank where it remained for about ten hours before it was completely dried. SAMUEL PIERPONT LANGLEY. It is safe to say that no just estimate of the very eminent and useful pioneers of the physical sciences for the past several decades would fail to include Sam uel Pierpont Langley. ley was graduated from the Boston High School in 1851 thereafter took up the study of civil engineer ing and architecture and subsequently practiced these professions furnishing an instance of a certain tend ency among men of attainment to believe in and utilize a minor talent in the beginning as the working field for a career. But his interest in astronomy was in neering and architecture went to the study of that science. Parts of the years 1864 and 1865 he spent in European travel visiting foreign observatories and learned institutions to return bent upon devoting his life to scientific pursuits. Th
Size: 3308px × 4722px
Location:
Photo credit: © Corantos / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: -quarters, 2, , , 15, 16, , , acetic, acid, air, bath, breadth, capacity, checked, clearing, completed, conveyed, cover, developed, developing, dipped, exposed, feet, fitted, fixing, fore, gigantic, hand, height, high, iced, ihe, interrupting, laid, length, light, liquid, ln, lron, means, meter, meters, minutes, moving, night, open, paper, part, photograph, picture, portions, process, projecting, protecting, pump, rails, remained, rinsing, slats, solutions, tank, tense, time, total, transferred, turned, twenty, water, wheels
