The steam engine is a reciprocating power machine, which converts the energy of steam into mechanical work. The appearance of the steam engine caused the industrial revolution in the18th century. Until the beginning of the 20th century, it was still the most important prime mover in the world, and then it gradually gave way to internal combustion engines and steam turbines. The inventor of the steam engine was Hiro, an ancient Roman mathematician who lived in Alexandria, a province in Rome. He is also an engineer, active in his hometown of Alexandria.

Because most of Hiro's works (including mathematics, mechanics, physics and gas mechanics) appear in the form of lectures, he is considered to have taught in the Muse House (including the Alexandria Library). In addition, although these academic fields were not formalized before the twentieth century, his inventions were all research materials of model control.

Hiro's other inventions

1, vending machine

The first vending machine in the world was also made by Hiroshi. It is said that when the slot at the top of the machine receives coins from the coiner, the machine will distribute a certain amount of holy water to the coiner. This invention is listed in Hiro's book Mechanics and Optics.

2. Steam organ

The steam organ is the first machine driven by wind energy in history. The power pump invented by Hiro was widely used in ancient Rome, and one of its uses was as a component of fire engines. Syringes made by Hiro are used to transport gas or liquid.

3. Babylonian method

Hiro invented a method of calculating the square root repeatedly, which is called Babylonian method. This formula was named after Babylonian, because the Babylonians knew this calculation before Herod. Nowadays, the name hero is closely related to Helen's formula, which calculates the area of a triangle by its side length.

Reference to the above content: Baidu Encyclopedia -Hiro