104 SPECTRES AND GHOSTS. 



him, any more than a person behind a looking-glass stand- 

 ing out upon a floor would see the images reflected in it to 

 those before it. The figure is represented there only to 

 show how it w r ould appear to the people in front. 



In the same manner, the outline of the figure upon the 

 glass itself is only imaginary, being sketched there only to 

 show how and where the light is reflected. There would 

 be no such image really there. The only things that would 

 actually exist would be the figure below, the light emana- 

 ting from it, and the images of it in the eyes of the specta- 

 tor. In other words, what the spectators really see is the 

 figure itself, only they see it by light coming to them in 

 zigzag lines, or, at least, lines taking one sharp turn, as it 

 is reflected in the glass, instead of in direct lines ; and as 

 the short turn taken by the rays of light at the glass is al- 

 together outside of the eye, their sense takes no cognizance 

 of it, and the object appears to them as if it were seen di- 

 rectly before them on the. stage. 



