Effects of the Orbicular and Rotary Motions of the Earth. 437 



Avith the phaenomena of all fluid bodies, and of all fixed bodies 

 when deprived of competent support, and of all bodies moved 

 out of their station by muscular or explosive force, and left with- 

 out support, a. E. D. 



The following illustrations and observations may tend to make 

 these })rinciples perfectly clear, and to remove all doubts. 



1. The projectile at its ape.x, when deprived of the projectile 

 force, is still immersed within the atmosphere, and is carried, or 

 urged, by the atmosphere, in the direction of the circular rota- 

 tion of the atmosphere. 



2. That circular rotation then produces, or solicits to produce, 

 (with a force proportioned to t'le relative densities of the at- 

 mosphere and projectile,) a deflection of the said projectile from 

 the right line of the orbicular motion, into the direction of the 

 circular motion at the place of contact. 



3. If the density of the projectile were equal to the density of 

 the atmosphere, then the projectile would float in the atmo- 

 sphere, and be carried round the earth in the circular vortex of 

 the earth, like the atmosphere itself. 



4. If it were denser tiian the atmosphere, then the rotary 

 momentum of the lighter atmosphere being less than the rotary 

 momentum of the projectile, resistance would be generated equal 

 to the difference of their rotary momenta ; and a deflection of 

 the denser bodv by the lighter atmosphere, into a smaller circle 

 of rotation, would take place till jt reached a competent basis on 

 the earth. 



5. If the projectile were lighter than the atmosphere, then 

 the momentum of the circumjacent atmosphere would be greater 

 than that of the projectile, and the projectile would, in conse- 

 quence, be forced upward into a larger rotary circuit, till its ro- 

 tary momentum equalled that of the circumjacent atmosphere. 



6. In media of uniform density, as in water, the projectile, if 

 heavier, sinks to the bottom ; if lighter, floats on the top, equali- 

 zing its momentum by presenting a portion of its mass within the 

 air; or, if of the same weight, floats indifferently within the fluid. 



7. As the deflective force is continually operating during the 

 fall, and as every uniformly continued force generates a con- 

 stantly accelerated motion, so as bodies fall by the action of a 

 continued deflective force, they are necessarily accelerated during 

 their fall, till they rest on the fixed parts of tl)e earth. But, 

 as is found by experiment, the increased resistance of the air, 

 arising from the increased motion, will occasion a balance of 

 the two forces, and an equable motion during part of the fall. 



8. Combining the time of falling, the spaces as determined 

 by Galileo, and by alleged experiments, with the actual basc^ 

 generated by the orbicular motion, the following will be the cle- 



£ c 3 nienti; 



