Scientific amusements . The Camera. at the Daguerreotype process. He thought he could teachpeople to draw by following the focussed picture with acrayon, but he could not conquer the aerial perspective. So the camera languished till 1820, when Wedgwoodand Sir Humphrey Davy attempted to obtain some views. Arrangement of lenses. with nitrate of silver, but they became obliterated whenexposed to the daylJght. As early as 1814, however, M. Niepce had made aseries of experiments in photography, and subsequentlyhaving heard that M. Daguerre was turning hi,s attentionto the same subject, he commuinca
Scientific amusements . The Camera. at the Daguerreotype process. He thought he could teachpeople to draw by following the focussed picture with acrayon, but he could not conquer the aerial perspective. So the camera languished till 1820, when Wedgwoodand Sir Humphrey Davy attempted to obtain some views. Arrangement of lenses. with nitrate of silver, but they became obliterated whenexposed to the daylJght. As early as 1814, however, M. Niepce had made aseries of experiments in photography, and subsequentlyhaving heard that M. Daguerre was turning hi,s attentionto the same subject, he commuincated with him. In 128 OPTICAL APPARATUS. 1827 a paper was read before the Royal Society, andin 1829 a partnership deed was drawn up betweenDaguerre and Niepce for copying engravings by photo-graphy. Daguerre worked hard, and at length succeededin obtaining a picture by a long process, to which, perhaps,some of our readers are indebted for their likenesses fortyyears ago. By means of iodine evaporated on a metalplate covered with gold-yellow, and exposing the platethen in a second box to mercurial vapour, he marked theimage in the camera, and then he immersed the plate inhyposulphate of soda, and was able to expose the imageobtained to daylight. But the mode now in use is the collodion h
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Keywords: ., bookcentury1800, bookdecade189, booksubjectscientificrecreations
