HH MARVELS OF POND-LIFE. 



or little hooks. They swim steadily on, and then 

 dart back, but not so far as they have advanced, 

 and may be seen to keep up this fidgetty motion 

 by the hour together. Pritchard tells us Ehrenberg 

 found that a single animalcule lived nine days; 

 during the first twenty-four hours it was developed 

 by transverse self-division into three animals; these 

 in twenty-four hours formed two each in the same 

 mfinner, so that by self-division only, (without ova,) 

 these animalcules increased three or four-fold in 

 twenty -four hours, and 772cnj thus produce a million 

 from a single aaiinalcule in ten days. Such are 

 the amazing powers of reproduction conferred upon 

 these humble creatures, powers which are fully 

 employed when the surrounding circumstances are 

 favourable, and which, in the aggregate, change 

 the condition of large masses of matter, and bring 

 within the circle of life nullions upon millions of 

 particles every minute of the day. 



