218 CELESTIAL MEASURINGS AND WEIGHINGS. 



position, however, with whose demonstration (founded 

 on the very elementary properties of a decreasing geomet- 

 rical progression) we shall not trouble our readers. 



(44.) Such a speculation as this just mentioned may 

 possibly appear irrelevant. But it must be remembered 

 that it is LIGHT, and the free communication of it from the 

 remotest regions of the universe, which alone can give, and 

 does fully give us, the assurance of a uniform and all- 

 pervading energy a mechanism almost beyond concep- 

 tion complex, minute, and powerful, by which that 

 influence, or rather that movement, is propagated. 

 Our evidence of the existence of gravitation fails us 

 beyond the region of the double stars, or leaves us at 

 best only a presumption amounting to moral conviction 

 in its favour. But the argument for a unity of design 

 and action afforded by light stands un weakened by dis- 

 tance, and is co-extensive with the universe itself 



