. The American annual of photography. ument has practicallyremained in its original form, and is so efficient that thewriter has no desire to replace it with any other which he hasseen in practice or heard described. The stand and part of the accessory apparatus has beenadded more recently, as the requirements of a new locationand technical work have demanded. AND FHOTOGRAPHIO TIMES ALMANAC. 175 In Fig. 1 the instrument is seen ready for use in producinglantern slides from 6^- x 8-J negatives; greater or less reduc-tion from larger or smaller negatives may be made by the useof various pieces o
. The American annual of photography. ument has practicallyremained in its original form, and is so efficient that thewriter has no desire to replace it with any other which he hasseen in practice or heard described. The stand and part of the accessory apparatus has beenadded more recently, as the requirements of a new locationand technical work have demanded. AND FHOTOGRAPHIO TIMES ALMANAC. 175 In Fig. 1 the instrument is seen ready for use in producinglantern slides from 6^- x 8-J negatives; greater or less reduc-tion from larger or smaller negatives may be made by the useof various pieces of the device seen in Fig. 2, as stored inbody of the stand. The elevation of front and back ends ofthe camera is effected by the removable handle seen project-ing from the front end of the stand. When these supportsare dropped to their lowest position a flat top can be placedupon tlie stand, and it becomes quite efficient for carrying anylarge camera which can be raised or dropped to any desiredangle within 45 deg. of the Fig. 1. Fig. 2. The movements of the lens and plate-holder carriages areeffected by rack and pinion, and their position is shown byverniers and scales on back end of base of plate-holder car-riage and top of lens carriage, the latter being examined byremoval of the long narrow cover held in place by a button ateach end, as shown. The circular head-piece, as shown inFig. 1, is so constructed as to admit horizontal, vertical, andcircular motion, each motion provided with a scale whichenables one to record positions for duplicate work. Fig. 2shows the camera with a non-rotating head used in makingpositives of about equal size to negative. The negative carry- 176 THE AMERICAN ANNUAL OF PHOTOGRAPHY, ing-board, or frame, is square and reversible, and is faced witha card-board diaphragm of chosen size and form, to show thepart of negative wanted on the glass positive. The negativeis held in position on the diaphragmed board, or frame, by aspring brass fi
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1892
