46 BOOK OP NATURE LAID OPEW. 



by night and by day, asleep or awake, in motion or 

 at rest, beats in unremitting pulsations, with greater, 

 regularity than a watch, in the breast ot some ani- 

 mals for sixty, in some seventy, and in others up- 

 wards of one hundred years. We might also notice 

 the admirable structure and wise disposition ot the 

 other parts in the animal economy, but this would 

 be inconsistent with our present limits and design ; 

 we must, however, observe on the whole, that each 

 will be fou^J| most conveniently situated for its re- 

 spective uses, and formed in the wisest manner for 

 its various purposes; that while nothing is wanting 

 to render the structure complete, there is nothing su- 

 perfluous or made in vain. The feelers of the 

 Butterfly are no less essential to her well being than 

 the proboscis of the Elephant; and the leg of the 

 Fly can no more say to its wing, than the eye of the 

 human body to its hand, " I have no need of thee." 

 But if the riglit consideration of the structure of 

 animals as well as the wise provision made for their 

 lodgment and subsistence, is convincing to the most 

 sceptical, that all are the doings of a Being infinite 

 in power, and fearful in working ; and inspire the 

 religious philosopher with such sentiments as David 

 expressed when contemplating the formation of the 

 human frame ; must we not also adopt such lan- 

 guage as he made use of on another occasion, and 

 say v when reflecting on the manner in which these 

 creatures are reproduced, and the wonders of that 

 procreative power by which a continued succession 

 is kept up ; Thine eyes saw them when they icere 



