A huge collection of manuscripts and notes by pioneering scientist Sir Isaac Newton are being made available online by Cambridge University Library.
London (CNN) -- A huge collection of papers belonging to pioneering scientist Sir Isaac Newton -- the father of gravity -- has been posted online by Cambridge University.
The archive includes Newton's college notebooks and some of his most important writings from the 1660s on mathematics and calculus, optics and gravity.
They appear alongside an annotated copy of "Principia Mathematica," the book in which Newton set out his laws of motion and gravity, and which is regarded as one of the world's most significant scientific works.
More than 4,000 pages of Newton material have been digitized so far, with archivists photographing and uploading as many as 200 pages a day.
Grant Young, the library's digitization manager, said the collection contained "perhaps some of the most important papers and documents in the history of science," which would give viewers a valuable insight into Newton's working methods.
"Anyone, wherever they are, can see at the click of a mouse how Newton worked and how he went about developing his theories and experiments," he said.
"Before today, anyone who wanted to see these things had to come to Cambridge. Now we're bringing Cambridge University Library to the world."
Many of the papers -- some of them badly damaged by fire or water -- have undergone delicate conservation work before being added to the archive.
They are also accompanied by transcriptions by the University of Sussex's Newton Project, allowing readers to decipher Newton's handwriting.
But some of the notes added to the papers over the years suggest some of the scientist's contemporaries may not have approved of the online publication.
Several of the manuscripts contain the line "not fit to be printed," written by Thomas Pellet, who was asked to review Newton's work after his death.
The Newton archive is part of Cambridge's Digital Library project that will eventually showcase other important scientific papers, including the works of Charles Darwin, Lord Kelvin and Ernest Rutherford.
Part of Darwin's personal library of hundreds of books -- many of them packed with the scientist's notes in the margins -- is already online.
You can view the Isaac Newton archive online at the Cambridge Digital Library.
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More than 4,000 pages -- just a fraction of the university's Newton archive -- have been digitized so far.
The collection has been painstakingly conserved and photographed, and will now be available to students and historians all over the world, via the University's digital library.
Mathematician and physicist Isaac Newton (1642-1727) described the law of gravity, developed calculus and discovered that sunlight is made up of a mixture of colours.
Newton's annotated copy of his most famous work, "Principia Mathematica," is among the works added to the online archive.
Some of the notes have been marked "Not fit to be printed" by Thomas Pellet, Newton's colleague and the executor of his works.
Grant Young, of Cambridge University Library, said the archive contained "perhaps some of the most papers and documents in the history of science."
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