68 ATOMS REQUIRE PRESSURE TO FORM CONDENSATION. 



It is not by any means evident, that the system of undula- 

 tion can be supported as one capable of independently effecting 

 the production of light, in straight lines, and with that re- 

 markable impetus which light so eminently displays, and 

 which undulatory motion alone cannot be in reason supposed to 

 Impart. 



It is equally improbable that the system of emanation can 

 be sustained, without the aid of some necessary auxiliary, upon 

 the principle, that if emanation was continuous, from a lumin- 

 ous body in a given period, exhaustion must consequently 

 ensue, which would not appear consistent with the present 

 order of the universe. 



But we can readily comprehend, that both systems, by their 

 united powers, can effect the production and transmission of 

 celestial light, and act conformably with the laws by which it 

 appears to be governed. 



Thus, the undulatory system may convey the idea, that the 

 compound spherical atoms of light continue to pervade our atmo- 

 sphere, and the entire intervening space between our earth and 

 the sun, and all the other heavenly bodies ; that these atoms 

 are in their free and expanded state REPULSIVE of each other, 

 from the angular position of the poles of their individual mole- 

 cules, exhibited on the surface of the compound atom of light, 

 see No. 5, Plate IV. ; that they require & pressure to bring them 

 into a uniform state of condensation, and also within the pre- 

 cincts of attraction, to be exercised on the proper poles (the 

 positive and negative) of the compound spherical atoms, so 

 that they may form a line of radiation ; and that such condition 

 is only to be effected by the projectile force of the compound 

 atoms of light emanating from a radiating point of a luminous 

 body, such as the sun, or the resplendent atmosphere with 

 which that body is surrounded, and which may be replenished 

 from the free light in space so as to prevent exhaustion*. 



* Query. May not the supply of FREE light, to replenish the atmosphere of 

 the sun be continuous, flowing in directly opposite lines, and intermediate to 



