98 ORIGIN OF THE ANIMATED TRIBES. 



liarities, however, which may quite well consist with the idea 

 of a universality of certain types, such as we see exemplified 

 upon earth. We come to comparatively matter of detail, 

 when we advert to heat and light ; yet it is important to con- 

 sider that these are universal agents, and that, as they bear 

 marked relations to organic life and structure on earth, they 

 may be presumed to do so in other spheres also. The con- 

 siderations as to light are particularly interesting, for, on our 

 globe, the structure of one important organ, almost univer- 

 sally distributed in the animal kingdom, is in direct and pre- 

 cise relation to it. Where there is light there will be eyes, 

 and these, in other spheres, will be the same in all respects as 

 the eyes of tellurian animals, with only such differences as 

 may be necessary to accord with minor peculiarities of con- 

 dition and of situation. It is but a small stretch of the argu- 

 ment to suppose that, one conspicuous organ of a large por- 

 tion of our animal kingdom being thus universal, a parity in 

 all the other organs species for species, class for class, king- 

 dom for kingdom is highly likely, and that thus the inha- 

 bitants of all the other globes of space bear not only a general, 

 but a particular resemblance to those of our own. 



It must be obvious, that, if organic beings are thus uni- 

 versally distributed, the idea of their having all come into 

 existence through the immediate agency of laws everywhere 

 applicable, is strictly conformable to the principle laid down 

 for our own limited sphere. As a set of laws produced all 

 orbs, their motions and geognostic arrangements, so a set of 

 laws overspread them all with life. The whole productive or 

 creative arrangements thus appear in unity. 



