Page:Popular Science Monthly Volume 8.djvu/110

100 The parts which have been already described being completed, proceed to fix them together with glue. Their correct position can be seen at a glance by reference to Fig. 12.

First fix the cradle, 6, upon the rod, 4 within three-quarters of an inch of the end next the tube, 5, upon the cradle, as shown. The stage and support can next be fastened, but first insert the paper tube, Fig. 11, in wooden tube, 5, and measure the most convenient



place to fix the stage, so that the object-glass can approach the object without bringing the tube too low down. A trial will at once fix the proper spot.

The legs are attached by screws to the cradle, as seen in Figs. 1 and 2. The whole being now in form, clean and French-polish.



Also paint the inside of the paper tube a dull black, using drop-black, turpentine, and a little Japan varnish to fix color, and the outside with a mixture of Indian and common inks. Finally, line tube, 5, with a piece of fine cloth. If this is neatly done, the paper tube,