122 DROPS OF WATER. 



displayed; the current in the water, formed 

 by the group, causing numerous little ani- 

 malcules and vegetable productions to whirl 

 about in a curious way. This current may be 

 observed more clearly still, if a small portion of 

 carmine or indigo be placed in the water, at 

 the same time the animalcules will be found to 

 eat it in vast quantities, the stomach cells be- 

 coming coloured either red or blue. They in- 

 crease rapidly by three different methods. 

 Though the act of depositing eggs has not 

 been perceived, still young ones appear in vast 

 numbers attached near the old ones to the same 

 substance, and gradually increasing in size. A 

 full-grown one will frequently be seen to have 

 a double appearance, and if this is watched, a 



