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The Optical Magic Lantern Journal and Photographic Enlarger.
101
Whether for instruction or for amusement, |
the lantern has a wide, and rapidly widening, field of usefulness still open to it; and if, while duly considering and endeavouring to meet the taste of the public from amongst whom the spectators are drawn, the caterer for their requirements will attempt to lead as well as to follow, by being careful to keep up the standard of work to the highest degree of excellence attainable, and never by any means to let it down or encourage its degradation by pindering to a depraved taste, satisfactory results will unquestionably follow, and success attend his efforts to please.
25.»
upon a donkey’s back. The boy tries to urge the donkey onwards, but it is stubborn—no unusual thing !—and will not do as its rider wishes it to. But instead, it does
ESPEN SE ( y AA HIS slide represents a boy sitting W Gh
j
just the reverse, and after several
plungings and kickings, succeeds in throwing the rider over its head on the ground.
For the construction of this slide-three glasses are employed, fitted into the ordinary wooden framework. It will hardly be necessary for me
to give details for the construction of this frame|
work. It would be needlessly taking up valuable space, and a reference to one of his own mechanical slides will show any lanternist
who wishes to construct the present slide how to make the necessary framework.
The two outside glasses are fixed, and the centre one is movable in a groove provided for
it in the framework. ‘These are shown in
Fig. IV. . The working parts of the boy are fitted up
on one side of the centre movable glass, and
the working parts of the donkey are fitted up
@ | on the interior surface of the fixed glass furthest
away from the boy.
Referring to Fig. I., the boy a is made of thin metal in one piece, as shown. To his body is glued a small grooved wheel 8. He is then
; pivoted to a small block r (Fig. IT.), glued to the
surface of the centre glass p by means of the screw E.
A thread cc (Fig. 1.) is then passed round the grooved wheel B, and the ends fastened to two blocks, one at each end of the fixed glass which is nearest the boy.
It will thus be seen that if the centre sliding glass be pushed along its groove the boy will be caused to revolve or turn head over heels, by means of the stationary thread passing round the wheel glued to his body. At the same time, because he is attached to the sliding glass by means of the block r (Fig. IT.), he will be carried on with the glass.
The method of fitting up the donkey will now
; be dealt with.
As before stated, it is fitted up on the fixed glass furthest away from the boy. In order to fully explain the relation of the donkey and the boy, iet reference be made to Fig. IV. Then, if the boy is attached to the left-hand side of the centre glass B 2, the donkey will be fitted up on the interior surface of the fixed glass c3. The blocks bearing the thread which causes the revolution of the boy would, of course, be glued to the extreme ends of the fixed glass al