Full Idea
The law of gravitation leads to many consequences which could not be discovered merely from the apparent motions of the heavenly bodies.
Gist of Idea
The law of gravity has many consequences beyond its grounding observations
Source
Bertrand Russell (Regressive Method for Premises in Mathematics [1907], p.275)
Book Reference
Russell,Bertrand: 'Essays in Analysis', ed/tr. Lackey,Douglas [George Braziller 1973], p.275