...The fall ofan apple intimated the law of gravitation... 
Frederick Douglass 「John Brown」
...Inthis position, in place of the pressure backward of the bowels proving ahindrance, their gravitation forward proves a most material help to reduction...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
..."Consider for a moment that the lawsof magnetism, insofar as concerns therelation between distance and power ofattraction, are exactly matched by thelaws of gravitation...
Various 「Astounding Stories of Super-Science February 1930」
..."I know that space is curved, that there is really no space or time,but only space-time, that electricity and gravitation and magnetismare all the same...
Various 「Astounding Stories, March, 1931」
...Probably,”he added, “it is a planetary fragmentof some odd composition that is lessresponsive to gravitation than the materialswith which we are familiar...
Various 「Astounding Stories of Super-Science, March 1930」
..."It is the practical application of Einstein's gravitation andelectricity in field relation...
Various 「Astounding Stories of Super-Science, October, 1930」
... where gravitation is at zero?...
Charles Willard Diffin 「The Finding of Haldgren」
...Thelight-pressure varies with the surface of the particle upon which it isexercised; the gravitational attraction varies with the mass or volume...
E. Walter Maunder 「The Astronomy of the Bible」
...The Paris Academy, in 1770, offered their prize for an investigation to see ifthis could be explained by the theory of gravitation...
George Forbes 「History of Astronomy」
..., thatthe law of gravitation extends to the most distant stars, and that many of themdescribe elliptic orbits about each other...
George Forbes 「History of Astronomy」
...If they grow large enough the gravitation of the sun draws them back, and they produce a negative charge in the solar atmosphere...
Garrett Serviss 「Curiosities of the Sky」
...But the weight of the Sun is known as well as its size; this follows as aconsequence of gravitation...
E. Walter Maunder 「Are the Planets Inhabited?」
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