A Body In Motion Tends To Stay

The Main Business Of Natural Philosophy Is To Argue From Phænomena Without Feigning Hypotheses, And To Deduce Causes From Effects Till We Come To The Very First Cause, Which Certainly Is Not Mechanical; And Not Only To Unfold The Mechanism Of The World, But Chiefly To Resolve These, And To Such Like Questions.

To Explain All Nature Is Too Difficult A Task For Any One Man Or Even For Any One Age. Tis Much Better To Do A Little With Certainty & Leave The Rest For Others That Come After Than To Explain All Things By Conjecture Without Making Sure Of Any Thing.

Centripetal Force Is The Force By Which Bodies Are Drawn From All Sides, Are Impelled, Or In Any Way Tend, Toward Some Point As To A Center.

I Have Not Been Able To Discover The Cause Of Those Properties Of Gravity From Phenomena, And I Frame No Hypotheses; For Whatever Is Not Deduced From The Phenomena Is To Be Called A Hypothesis, And Hypotheses, Whether Metaphysical Or Physical, Whether Of Occult Qualities Or Mechanical, Have No Place In Experimental Philosophy.

This Excellent Mathematician Having Given Us, In The Transactions Of February Last, An Account Of The Cause, Which Induced Him To Think Upon Reflecting Telescopes, Instead Of Refracting Ones, Hath Thereupon Presented The Curious World With An Essay Of What May Be Performed By Such Telescopes; By Which It Is Found, That Telescopical Tubes May Be Considerably Shortened Without Prejudice To Their Magnifiying Effect. On His Invention Of The Catadioptrical Telescope, As He Communicated To The Royal Society.