## Isaac Newton’s Principia Book 2

In the Principia, Book Two, Lemma II, Newton describes what is essentially the Product Rule for differentiation, applying it to calculate the `moments’ of quantities that are expressed as products of powers of other quantities whose moments are known.

## Opticks

One of the most readable of all the great classics of physical science, *Opticks* presents a comprehensive survey of 18th-century knowledge of light. Newton describes his experiments with spectroscopy, colors, lenses, reflection, refraction, and more, in language lay readers can easily follow.

**Differences between Principia and Opticks**

#### Open Me

## Other Writings

*De analysi per aequationes numero terminorum infinitas*(1669, published 1711)*Method of Fluxions*(1671)*Of Natures Obvious Laws & Processes in Vegetation*(unpublished, c. 1671–75)^{[138]}*De motu corporum in gyrum*(1684)*Philosophiæ Naturalis Principia Mathematica*(1687)*Reports as Master of the Mint*(1701–25)*Arithmetica Universalis*(1707)*The System of the World*,*Optical Lectures*,*The Chronology of Ancient Kingdoms, (Amended)*and*De mundi systemate*(published posthumously in 1728)*Observations on Daniel and The Apocalypse of St. John*(1733)*An Historical Account of Two Notable Corruptions of Scripture*(1754)

## More

The Newton Project Created in 1998, the Newton Project seeks to make facsimiles and transcriptions of Newton’s manuscripts available in electronic form and to display their original connections, along with full documentation relating to Newton’s reading such as written notes and annotations.

Newton’s Three Laws of Motion Sir Isaac Newton: The Universal Law of Gravitation Sir Isaac Newton and the Unification of Physics & Astronomy These three links are all part of the Astronomy Web Syllabus at the University of Tennessee. A clear, accessible and well-illustrated guide to Newton’s laws.