## 1635 – Robert Hooke – bio

Robert Hooke was born in 1635 on the Isle of Wight in England. He was known as an architect and philosopher, but made contributions in many fields. He discovered Hookes Law of elasticity which describes the compression and extension of springs. He collected observations made with magnifying lenses, of both small objects and distant objects, and published them as “Micrographia” in 1665. This work include the use of the word “cell”, observations of lunar craters, and a wave theory of light.

Hooke invented the iris diaphragm, the universal joint, the balance spring (for clocks and watches), a respirator, and help build vacuum pumps that Robert Boyle used to experiment with gases. In 1674, he published a theory of planetary orbital motion based on a balance between inward gravitational attraction and outward centrifugal force. He made advances with both microscopes and telescopes.

PRECURSOR:

**-0325 – Euclid**

**1501 – Cardano**

**1564 – Galileo**

**1571 – Kepler**

**1595 – Microscope**

**1608 – Telescope**

CONCURRENT:

1615 – Wilkins

1616 – Wallis

**1623 – Pascal**

**1627 – Boyle**

**1629 – Huygens**

**1632 – Van Leeuwenhoeke**

1656 – Halley

**1642 – Newton**

1664 – Newcomen

SUBSEQUENT:

**1707 – Euler**

**1736 – Lagrange**

**1738 – Herschel**

**1749 – Laplace**

**1773 – Young**

1859 – Semon