112 LETTEES ON NATURAL MAGIC. 



will envelope the young and the old, and the sallow 

 faces will alone escape from the metamorphosis. 

 Each individual derives merriment from the cada- 

 verous appearance of his neighbour, without being 

 sensible that he is himself one of the ghostly 

 assemblage. 



If, in the midst of the astonishment which is 

 thus created, the white lights are restored at one 

 end of the room, while the yellow lights are 

 taken to the other end, one side of the dress of 

 every person, namely, that next the white light, 

 will be restored to its original colours, while the 

 other side will retain its yellow hue. One cheek 

 will appear in a state of health and colour, while 

 the other retains the paleness of death ; and, as 

 the individuals change their position, they will 

 exhibit the most extraordinary transformations 

 of colour. 



If, when all the lights are yellow, beams of 

 white light are transmitted through a number of 

 holes, like those in a sieve, each luminous spot 

 will restore the colour of the dress or furniture 

 upon which it falls, and the nankeen family will 

 appear all mottled over with every variety of tint. 

 If a magic lantern is employed to throw upon the 

 walls or upon the dresses of the company lumi- 

 nous figures of flowers or animals, the dresses 

 will be painted with these figures in the real 

 colour of the dress itself. Those alone who 

 appeared in yellow, and with yellow complexions, 

 will, to a great degree, escape all these singular 

 changes. 



If red and blue light could be produced with 

 the same facility and in the same abundance as 

 yellow light, the illumination of the apartment 



