During his final years Newton brought out further editions of his central works. After the first edition of the Opticks in 1704, which merely published work done 30 years before, he published a Latin edition in 1706 and a second English edition in 1717–18. In both, the central text was scarcely touched, but he did expand the “Queries” at the end into the final statement of his speculations on the nature of the universe. The second edition of the Principia, edited by Roger Cotes in 1713, introduced extensive alterations. A third edition, edited by Henry Pemberton in 1726, added little ...(100 of 5543 words)