The sciopticon manual, explaining lantern projection in general, and the sciopticon apparatus in paricular (1877)

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84 SCIOPTICON MANUAL. to produce countless variations in the effects developed, by which an endless variety and constant novelty can be secured. For this purpose there is needed in the first placed the simple apparatus shown in our wood cut, consisting of a small tank, made by securing two plates of glass, about 4x5 inches, with four clamps, against a strip of rubber about £ inch thick, bent into the three sides of a rectangle and notched at the corners to facilitate its bending. "We then require one or more glass pipettes provided with elastic balls, such as are made by the rubber manu- facturers. This little apparatus is shown in Fig. 27, where A is the rubber ball, B the glass globe of the pipette, and C its point drawn to a moderately fine orifice. A few small pipettes made by simply draw- ing short pieces of glass tube to a fine point, are also useful. In addition, a few bottles with such ordi- nary chemicals as will be mentioned further on, will complete the outfit. Having placed the tank, three-quarters full of water, as an object in the lantern, a num- ber of chemical reactions can be shown, as J?l*/.X,f, follows: Experiment 1st. Pour in a little solution of sulphate