Sir Isaac Newton (1642-1727) in the Yahoo! Directory

Sir Isaac Newton
Biography dividing his life into three distinct periods.
www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Newton.html
Newton's Life
Brief biography.
www.newton.cam.ac.uk/newtlife.html
Sir Isaac Newton (1642-1727)
From A Short Account of the History of Mathematics by W.W. Rouse Ball.
www.maths.tcd.ie/pub/HistMath/People/Newton/RouseBall/RB_Newton.html
BBC: Sir Isaac Newton Biography
Overview of his early years, time at university, and his contribution to mathematics, optics, and chemistry.
www.bbc.co.uk/history/historic_figures/newton_isaac.shtml
Sir Isaac Newton: Scientist and Mathematician
Directory of web resources looking at his accomplishments in mathematics, optics, and physics.
www.lucidcafe.com/library/95dec/newton.html
Isaac Newton (1642-1727)
Biographical sketch of the scientist from Eric Weisstein's World of Scientific Biography.
www.treasure-troves.com/bios/Newton.html
Isaac Newton: Mathematical Principles
Excerpts of Newton's text.
www.fordham.edu/halsall/mod/newton-princ.html
Voltaire: Letters on Newton
From Letters on The English or Lettres Philosophiques, c. 1778.
www.fordham.edu/halsall/mod/1778voltaire-newton.html
Isaac Newton: Optics
From the Modern History Sourcebook.
www.fordham.edu/halsall/mod/newton-optics.html
Sir Isaac Newton: The Principia
Translations of portions of several of the books.
members.tripod.com/gravitee
Newton's `Principia', Book Two.
In Latin and English with contemporary criticism of Newton's proof.
www.maths.tcd.ie/pub/HistMath/People/Newton/Principia/Bk2Lem2
Newton's `Principia': Book Two, Lemma II (English)
www.maths.tcd.ie/pub/HistMath/People/Newton/Principia/Bk2Lem2