422 Scientific Intelligence. 
there successively by wind and storms, The atmosphere was healthily 
influenced by its horizontal currents, and by ever-varying clouds and 
vapors rising, condensing, dissolving, and falling in endless vertical cireu- 
lation. With these conditions of life, we know that life itself has been 
enjoyed throughout the same countless thousands of years; and that 
eath. 
the main.” Geol demonstrates that the creative force has not deserted - 
this earth during any of her epochs of time; and that in respect to no 
one class of animals has the manifestation of that force been limited to 
formations of the earth’s crust. Species after species of land animals, 
that there are periodical 
tic elements depending on the hour of the day, the 
strange intervals of about eleven 
