..."Nearly two months have passed since the new satellite crashed intothe gravitational field of Earth, its coming manifested by earthshocks and a great tidal wave... 
Various 「Astounding Stories, August, 1931」
...But unheeding in their eagerness thisstrange effect of the satellite's lesser gravitational power, theymoved on, each step a giant, clumsy leap...
Various 「Astounding Stories of Super-Science, August 1930」
...The gravitational pullof the moon keeps him from falling to the earth and that of the earthkeeps him from approaching the moon...
Various 「Astounding Stories of Super-Science July 1930」
..."It is a matter of the properutilization of two forces, electricaland gravitational," proudly explainedDr...
Clifford Donald Simak 「Hellhounds of the Cosmos」
...We learned that the greatcontrol station contained these gravitational mechanisms, as well asthe mechanism by which the Earth had been attacked...
Raymond King Cummings 「Wandl the Invader」
...The Earth has other slight motions calledperturbations, which are produced by the gravitational attraction ofother members of the solar system...
Thomas Orchard 「The Astronomy of Milton's 'Paradise Lost'」
...The pendulum thus enables us to make a gravitational survey of thesurface of the earth with the highest degree of accuracy...
Robert Stawell Ball 「The Story of the Heavens」
...Thus, the nearer an object is to the earth, for instance,the stronger is the gravitational pull which it gets from it; thefarther off it is, the weaker is this pull...
Cecil G. Dolmage 「Astronomy of To-day」
...Possibly the powerful gravitational action of the huge body ofJupiter hard by, disturbed this region so much that the matterdistributed through it was never able to collect itself into a singlemass...
Cecil G. Dolmage 「Astronomy of To-day」
...Even if notso close, the gravitational strains set up would produce tremendouseruptions of matter; and in this case, a spiral movement would also begenerated...
Cecil G. Dolmage 「Astronomy of To-day」
...The only effect of gravitational perturbation and of collisions isgradually to broaden out the whole ring, enlarging its outer anddiminishing its inner diameter...
Oliver Lodge 「Pioneers of Science」
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