Living pictures; their history, photoproduction and practical workingWith a digest of British patents and annotated bibliography . poses and not cfanalytical photographs securedfrom a moving figure. Asshown in Fig. 49, the apparatusconsisted of a large wheel con-taining nine divisions, each ofwhich was furnished with twoopenings for the purpose ofcarrying transparencies. Thewhole disc could be revolved,step by step, by means of aratchet and pawl worked byhand through a reciprocatingbar. A shutter, operated by thesame means, was so arrangedas to cover the pictures during the whole period ofsubs
Living pictures; their history, photoproduction and practical workingWith a digest of British patents and annotated bibliography . poses and not cfanalytical photographs securedfrom a moving figure. Asshown in Fig. 49, the apparatusconsisted of a large wheel con-taining nine divisions, each ofwhich was furnished with twoopenings for the purpose ofcarrying transparencies. Thewhole disc could be revolved,step by step, by means of aratchet and pawl worked byhand through a reciprocatingbar. A shutter, operated by thesame means, was so arrangedas to cover the pictures during the whole period ofsubstitution. The transparencies were prepared fromposed subjects, such as the six different positions in awaltz, etc., the figures being three-quarters of an inchin height and projected to life size. The negativeswere wet collodion, and that is sufficient reason whyposing was necessary; putting the question of timerequired for exposure on one side, there still remainedthe difficulty of rapidly substituting a fresh sensitivesurface for the one just exposed, and this difficultycould not be fully overcome until the introduction of. Fig. 49. 48 LIVING PICTURES. dry plates or, better still, films. But advances werenevertheless made, for the rise of chrono-photographyafforded opportunity to work out mechanical detailsfor obtaining rapid successive exposures, though theresulting views were not intended for subsequentrecombination into motion. It was in the same year (1870) that Marey com-menced his researches on the analysis of motion, andthe advance in sensibility of photo-surfaces has lentcontinual aid from that time onward. Marey in Franceand Muybridge in America soon entered mto com-munication; the latter started work in 1872, theircommon object being the discovery of the successiveattitudes which collectively make up a given motion,though they worked by somewhat different confined himself from the first to the method ofcasting his series of momentary exposures on onepl
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Keywords: ., bookcentury1800, bookdecade1890, booki, booksubjectmotionpictures
