**Done By: Keerthana Sundar, Tang Xue Chun, Therese Ho, Sun Xue and Trishala**

**At a Glance:**

**December 25, 1642:**·Isaac Newton born in Woolsthorpe, England.

**1654:**·Newton enrolled in the Grantham Grammar School.

**1661:**·Newton enrolled in Trinity College, Cambridge.

**July 1662:**·Founding of the Royal Society.

**1665:**·Newton received his bachelor of arts from Trinity College.

**1666:**·. Newton conducted prism experiments, discovered spectrum of light, worked out his system of "fluxions," precursor of modern calculus and began to consider the idea of gravity.

**1667**: Newton elected a Fellow of Trinity College.

**1669:**·Newton appointed Lucasian Chair of Mathematics at Trinity for the next thirty-four years.

**January 11, 1672:**·Newton elected to the Royal Society.

**February 1672:**·Newton's paper on optics and his prism experiments sent to the Society. Rivalry with Hooke began.

**1670s:**·Newton worked on the mathematics of gravitation in his home in Cambridge.

**1674:**·Hooke wrote book in which he suggested existence of "attractive powers," akin to gravity.

**January 1684:**·Hooke discussed principle of inverse squares with Christopher Wren and Halley.

**August 1684:**·Halley visited Newton in Cambridge, where they discussed the principle inverse squares and its relationship with planetary orbits.

**November 1684:**·Newton completed his calculations on gravity and shared them with Halley, who urges him to publish.

**February 1685:**·Newton sent a brief treatise,

**Propositiones de Motu**

*to the Royal Society, outlining his findings.*

**,****April 1686**

**:**·Newton presented the first book of the Principia to the Royal Society.

**September 1687:**·Publication of the complete Principia

*.*

**1689:**·Newton elected as Cambridge's representative to Parliament.

**1693:**·Newton's "Black Year". He was plagued by depression and insomnia, and apparently suffered a nervous breakdown in September.

**1695:**·Newton appointed warden of the Mint, to oversee the implementation of a new currency. He left Cambridge and moved to London.

**1699**

**:**·Newton named master of the Mint.

**1703:**·Death of Hooke; Newton elected President of the Royal Society.

**1705**

**:**·Newton knighted by Queen Anne.

**1712:**·Royal Society commission, under Newton's direction, investigated the competing claims of Leibniz and Newton to having developed calculus, and decided in favor of Newton.

**1713:**·Second edition of the Principia published.

**November 14, 1714:**·Death of Leibniz.

**1726:**·Third edition of the Principia published; all reference to Leibniz removed.

**March 20, 1727:**·Death of Sir Isaac Newton, in London.

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