| Show camera to aid in drawing this instrument a camera for draw ing calls for an outlay of from BO 50 cents to for a lens unless the reader Is fortunate enough to already possess a double convex lens or what is known among boys as a burning glass A small mirror or piece ot of looking glass a small pane of corn com mon window glass and an old soap or to C bat candle box or some pine lumber of to make a box Is all the mate rial required let the box be about 18 inches long 9 inches deep and 12 inches wide fas ten the lens in a hole cut tor for that pur pose at one end of the box A piece of looking glass in rat bo be fixed at an an gle of aa 40 degrees at the opposite end i of the box it if from where the top of 1 the glass rests against the end board it measures nine inches to the bottom of 0 the box then the of the glass should be nine inches from the end ot of the box grind one side of the surface of the window pane glass by rubbing it upon a flat stone or sandpaper make a lid to the top of the box as shown in the illustration and under the lid fasten the ground glass paint or blacken the inside of the box and adjust the by experiment so that when the lens Is turned toward any object that object will III be immediately reflected upon the piece of ground glass this Is very easily done it if a piece of drawing paper Is placed over the ground glass and the lens turned toward some object that object III 41 be reflected upon the glass and shown thon through the paper in all its natural colors strong enough to be ac ru traced and reproduced our little artists can draw some wonderful I 1 li i tures in this way it one of these instruments be taken into a darkened room and the lens al lowed to point out through the window ever thing that passes the house will be reflected upon the ground glass making a sort cf moving colored pup pet pot show |
