^ 



CARMINE, ETC., AS FOOD. 33 



few seconds the internal sacs will be filled with 

 red colour, whilst the rest of the body will re- 

 tain its original appearance. The cilia, probosci- 

 des, and other appendages will also be much more 

 clearly perceived than without the assistance of 

 the foreign substance. This experiment requires 

 some nicety and care, and the new diet does not 

 seem to injure the animalcules, for, as indigo'and 

 sap-green are vegetable, and carmine is an animal 

 production, they probably do not find them dis- 

 agreeable; but no metallic substance must be used. 

 It is a wonderful fact, that a drop of water 

 exhibiting to the eye only a few particles of ve- 

 getation and sand, may, by the aid of a glass, 

 be found to contain a crowd of animated be- 

 ings, all beautifully and curiously constructed, 



