EARTH-LIFEFORMATION. 375 



is its Motion along with the whole solar sys- 

 tem around some supposed cosmical center. 

 Coupled with these Motions are the changes 

 of day and night (axial) and those of the sea- 

 sons (orbital). What changes the third Mo- 

 tion (galactal, we can conceive it) has brought 

 or will bring, is of course unknown; but it is 

 not improbable that even this remote influence 

 may have produced some variations of Earth- 

 life in the long periods of the past. 



The terrestrial sphere in its spherical mo- 

 tions is in striking contrast with the Plant 

 and Animal. The Plant is fixed to the Earth 

 on the whole, and has mainly an inner move- 

 ment of growth, a pushing outwards in lay- 

 ers during its round of life. The Animal in 

 general has a limited power of locomotion on 

 the Earth's surface. Both, therefore, mani- 

 fest broken or finite Motion in comparison 

 with the perpetual or infinite Motion of the 

 Earth, which they seem to have the power of 

 tapping individually for a small portion of 

 motive power. 



2. The Earth-organism in its dual sym- 

 metry. The sphere is naturally symmetrical 

 in its two halves or hemispheres. The equa- 

 tor is the well-known median line of the 

 Earth which is not an exact sphere, but tech- 

 nically an oblate spheroid. Parallel to this 

 median line are drawn the lines of latitude 



