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The Optical Magic Lantern Journal and Photographic Enlarger. 51
ZY ea HE construction of this slide enables G
H a : the operator at the lantern to put
the figure through all the evolutions \ of swinging by the simple backward se) Is
glass working in a groove made in the framework. A wooden framework of _ the ordinary size is employed. A portion of the back can be removed when . required by withdrawing one or two screws. A glance at Fig. VII. will explain, but I shall refer to this again presently.
On what will be the fixed glass is glued a block c (Fig. IV.), bearing two pins 3 and x. Two lengths of wire, © and F, are cut off and bent round into the shape shown, and then pivoted to J and k.
It will be noticed that = has a loop in the middle and a larger one at the top end. Above the block c is painted in dead black a -semicircle 0, the purpose of which is to hide the movement of the block a, to which I ghall refer
and forward movement of a sliding
again. On this glass is also painted the two upright supports of the trapeze or swing, care being taken to paint G a little lower than a, to give the proper perspective. If these supports are placed in the position shown in Fig. I., when the model is worked the figure will appear to pass between the two posts as it swings to and fro, A few lines should be drawn upon the fixed glass to represent the ground. The body and head of the man are cut out of thin metal, and the legs and arms, also of thin metal, are pivoted to the body in the manner shown in Figs. II. and III.
A careful reference to the last two mentioned Figs. will show clearly the order in which the different parts of the figure are to be fastened together. Fig. II. shows the front view, whilst Fig. III. shows the back view. It will be seen that the hand of the arm 6 is soldered to the wire E, but the other end is. left free; thus it