140 



LETTERS ON NATURAL MAGIC. 



dicular to the middle of it as the other is to the other side, 

 they will see each other but not themselves. If we now 

 suppose M C, C D, N C, C D to be the partitions of two 

 adjacent apartments, let square openings be made in the 

 partitions at A and B, about five feet above the floor, and 

 let them be filled with plate glass, and surrounded with a 

 picture frame, so as to have the appearance of two mirrors. 

 Place two mirrors E, F, one behind each opening at A 

 and B, inclined 45 to the partition M N, and so large 

 that a person looking into the plates of glass at A and B 

 will not see their edges. When this is done it is obvious 



Fig. 3. 



that a person looking into the mirror A will not see him- 

 self but will see any person or figure placed at B. If he 

 believes that he is looking into a common mirror at A, 

 his astonishment will be great at seeing himself trans- 

 formed into another person, or into any living animal 

 that may be placed at B. The success of this deception 

 would be greatly increased if a plane mirror suspended 

 by a pulley could be brought immediately behind the 

 plane glass at A, and drawn up from it at pleasure. The 

 spectator at A having previously seen himself in this 

 moveable mirror, would be still more astonished when ho 

 afterwards perceived in the same place a face d inherent 



