## 1608 – Torricelli – bio

Evangelista Torricelli was born in Italy in 1608 and was a mathematician, astronomer and physicist, mainly known for inventing the barometer. He advanced Galileo’s work on the trajectory of projectiles and worked on rotating shapes around an axis to create three dimensional figures. This helped him create extensions to Cavalieri’s method of indivisibles. “Torricelli’s theorem” related to liquid flow helped create the field of hydrodynamics.

Galileo had proposed that water pumps failed at an elevation of 34 feet because of some involvement with vacuum. Berti designed an experiment to test this theory using water. Before Torricelli, it was generally accepted that air did have any weight. But he challenged that idea and invented the mercury barometer to show that air created a pressure from it’s weight. Mercury was used instead of water because it’s greater density allowed the instrument to be 32 inches in length instead of 34 feet.

PRECURSOR:

-0262 – Apollonius

**-0287 – Archimedes**

**0085 – Ptolemy**

**1206 – suction pump**

**1473 – Copernicus**

**1546 – Brahe**

CONCURRENT:

**1564 – Galileo**

**1571 – Kepler**

**1588 – Mersenne**

**1596 – Descartes**

1598 – Cavalieri

**1601 – Fermat**

**1623 – Pascal**

**1627 – Boyle**

**1643 – barometer**

SUBSEQUENT:

**1650 – vacuum pump**

**1854 – mercury vacuum pump**