drop. By means of involves no mechanism. It consists of an inexpensive present a porgeous appearance. It is not difficult to an equal number of three-armed wiper cams, which are prism, having attached to the knob on either end a understand that whatever is exhibited in the spectrum rubber band. In… … Fig. g.-SOCKING FBISM ADAPTED TO THE LANTEBN. Fig. 1. SIMPLE ROCKING PEISM. appear upon the screen with the exception of the colored extremities. With the prism not shown in the engraving, the fallers are alternately supported in this way, it is an easy matter to turn it must have existed in the…
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