lit 



nature provides them with such supplementary j-uice~ ? 

 by a kind of exudation from their pores, as form ar 

 new shell beneath, 



Proceed we to those animals, whose transformations 

 are more complete, which being fully possessed of life 

 in one figure, afterwards assume another, or being 

 first in one, afterwards inhabit a quite different element. 



To give an instance of each, the egg of a frog being 

 laid in the water, produces a lively animal which we 

 call a Tadpole, He has a thin slimy tail, which steers 

 him in the water, in which he wholly resides. But 

 after awhile, legs and feet burst through the skin ; the 

 tail drops off, he is a perfect quadruped. He leaps 

 upon the earth, and ranges over that ground, on which 

 some time since it would have been death to him to 

 be cast. 



The Beetle-class is an instance of the other change 

 and particularly the cock-chaffer. The female de- 

 posits her egg below the surface of the earth, which 

 hatches into a grub, with two or three pair of strong 

 forcipes, whereby it is enabled to force its way through 

 the mould where it was lodged, and to cut and tear in 

 pieces for i& nourishment any small roots which come 

 in its way. After staying here two whole years, a 

 shelly covering forms over its soft body, a pair of ft tie 

 wings grow on its back, to secure which from dan- 

 ger, when not used, a pair of-strong cases are provided. 

 And now forcing his way out of the grouud ; he be- 

 comes a lively inhabitant of the aif, 



