126 VESTIGES OE THE 



diftiised in one mass, of which the splieres are portions. 

 Consequently, inorganic matter must be presumed to be 

 everywhere the same, although probably with differences 

 in the proportions of ingredients in different globes, and 

 also some difference of conditions. Out of a certain 

 number of the elements of inorganic matter are composed 

 organic bodies, both vegetable and animal; such must be 

 the rule in Jupiter and in Sirius, as it is here. We, 

 therefore, are all but certain that herbaceous and ligneous 

 tibre, that Hesh and blood, are the constituents of the 

 organic beings of all those spheres which are as yet seats 

 of life. Gravitation we see to be an all-pervading prin- 

 ciple : therefore there must be a relation between the 

 spheres and theii- respective organic occupants, by virtue 

 of which they are fixed, as far as necessary, on the 

 surface. Such a relation, of course, involves details as 

 to the density and elasticity of structure, as well as size, 

 of the organic tenants, in proportion to the gravity of the 

 respective planets — peculiarities, however, which may 

 quite well consist with the idea of a universality of 

 general types, to which we are about to come. Elec- 

 tricity we also see to be universal ; if, therefore, it be a 

 principle concerned in life and in mental action, as 

 science strongly suggests, life and mental action must 

 everywhere be of one general character. We come to 

 comparatively a matter of detail, when we advert to heat 

 and light ; yet it is important to consider that these ai-e 

 universal agents, and that, as they benr marked relations 

 to organic life and structure on eartli. tliey may be 

 presumed to do so in other splieres also. Tlie considera- 

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

 globe, the structure of one imjjortunt organ, almost 

 universally distributed in the animal kingdom, is in 

 direct and precise relation to it. Where there is light 



