SOLAR DAYS AND SOLAR NIGHTS. 41 



57. As our sun is a star, if therefore every star in 

 the firmament undergoes, at distant intervals, a 

 periodic change from light to darkness, and again 

 from darkness to light, then are proofs to be found in 

 the crust of the earth, which go to establish the 

 remarkable fact, that in the past history of our globe 

 there has occurred the alternate succession of Solar 

 Days and Solar Nights f 



58. If so, is the number of Solar Days and Solar 

 Nights, which Nature in the history of our globe 

 has recorded, just equal to the number of geological 

 systems, of which the crust of the earth is mainly 

 constituted ? 



59. And if so, was the duration of a Solar Day 

 just that period in which the series of strata that 

 constitutes a geological system was deposited ? And 

 was the duration of a Solar Night just the interval 

 that occurred between the deposition of one geologi- 

 cal system and the commencement of the deposition 

 of another the next in succession ? 



60. Or was that period in which the animals and 

 plants belonging to the same creation continued to 

 exist the duration of a Solar Day f And was the 

 interval that occurred between the extinction of one 

 creation of animals and plants and the commence- 

 ment of another creation, the next in succession : 



