..."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」
...And meanwhile,they were hurtling outward through space at a rate of speed he knewwould presently carry them beyond the gravitational pull of the earth...
Various 「Astounding Stories, July, 1931」
...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」
...He let the circle enlarge, then swungthe ship end for end in mid-space that the more powerful stern exhaustmight be ready to counteract the gravitational pull of the new world...
Charles Willard Diffin 「Brood of the Dark Moon」
...Three giantchains! Then Wandl, traveling of its own gravitational volition, wouldwithdraw from our solar system...
Raymond King Cummings 「Wandl the Invader」
...The gravitational chains would pullthe Earth...
Raymond King Cummings 「Wandl the Invader」
...A few more of these gravitational attacks and then the helplessplanets, with rotation checked, would be towed away by Wandl, out intothe deadly cold of interstellar space...
Raymond King Cummings 「Wandl the Invader」
...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」
...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」
...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」
...The weight of a body, on the other hand, dependsentirely upon the gravitational pull which it receives...
Cecil G. Dolmage 「Astronomy of To-day」
...The Tides are caused by the gravitational pull of the sun and moon uponthe water of the earth's surface...
Cecil G. Dolmage 「Astronomy of To-day」
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