of the Universe. 101 



3. Nor is it important whether the medium be dense or rare, 

 for it is the moving agent; it mav answer that purpose whatever 

 be its density, and may prodnee its particular result, whatever 

 be its rarity: as an agent of motion it is like a current which 

 moves a ship, not through itself with resistance, but within itself 

 without resistance, p. 53. 



4. We know too that a mechanical action or protrusion may 

 be produced between bodies, through a fluid or gaseous mediun), 

 as well as through an organization of fixed matter; the effect 

 however, whicli is imperfect in our expanding atmosphere, is per- 

 fect in the unyielding medium which tills universal space, p. 55. 



5. That motion transfers motion throughout all the bodies of 

 infinite s|)ace, and that all motion is produced by motion, p. 48. 



6. No attraction or effect without mechanical cause is in this 

 theory supposed to be concerned in producing plia^nomena; every 

 mass remains inert in space, and when moved, it moves in the 

 degree only in vvhich it is acted upon, and has no natural or 

 innate inclination to move one way rather than another. Con- 

 sequently the progressive impulse of the rare medium of univer- 

 sal space is as efficient in producing orbicular motion, as would 

 be a current of water or mercury, p. 6G. The momentum in 

 every line radiating from the origin of motion, i)eing inversely as 

 the square of the length of the line, p. 60. If the density of a 

 projectile were equal to the density of the medium, then the pro- 

 jectile would float in the medium, and be carried round the earth 

 in the circular vortex of the earth like the medium itself p. 36. 



7. A body elevated from an inferior circle of rotation into 

 one where a more rapid motion exists^ or v.'iicre a motion exists 

 vvhich does not accord with the density of the elevated body, is 

 necessarily repelled from superior strata to inferior strata, till it 

 finds its due level or balance of motion and density. Thus, if a 

 projectile have a specific density equal to the air or fluid into 

 which it has risen, it will be cariied round the earth in the con- 

 centric circle of that stratum, i)ecause the momenta are there 

 equal ; but if it be lighter than the air, it will then be reflected 

 by the denser strata till its own momentum and the momenta of 

 the surrounding bodies are ef|ualized : on the other hand, if it 

 be heavier than the circumambient air or fluid, then the air or 

 fluid will rise over it and deflect it to the earth, with a force 

 which must be in a fixed ratio of their distances, p. 21. 



S. The momenta of each of the strata being e(|ual, and eon- 

 •.isting of the velocity multiplied by the (juantity of matter; and 

 the density of an equal quantity of matter in a sphere being as 

 the cube of the radius, the densities of the successive strata in a 

 series of concentric strata having ecpial momenta, must be in- 

 versely to each other a« the cubes of the radii, 



9. The 



