Landscapes or other matters may be drawn so as to produce curious optical illusions by the following method. Take a piece of smooth white pasteboard and sketch the design upon it. Prick the outlines in every part with a fine pin or needle, then place the pricked drawing in a perpendicular position, and put a lighted candle behind it. Place before it another piece of pasteboard, and follow with a pencil the lines given by the light, and you have produced a distorted landscape. Now take away the candle and the pricked drawing, and place your eye where the light was, and the drawing will assume the regular form. To get your eye in the proper position, it will be advisable to cut out a piece of card according to the accompanying [pattern], and raising it on its base, B, look through the hole at A, when the object will appear in its proper proportions.
PHOTOGRAPHY.
“Come like shadows, but not so depart.”—Shakspeare.
Associated with the use of iodine and bromine is an art which every intelligent boy may practise, if he will attend to the following precise details kindly furnished by Mr. Richard Thomas, of 10, Pall Mall, who has devoted many years to the careful study of all the processes connected with it, and from whom all the best apparatus and purest chemicals required may be obtained.