Encyclopedia > Heron of Alexandria

  Article Content

Hero of Alexandria

Redirected from Heron of Alexandria

Hero (or Heron) of Alexandria (roughly A.D. 10 to roughly A.D. 70) was a Greek engineer. His most famous invention was the first documented steam engine, the aeolipile. He is said to have been a follower of the Atomists[?]. Some of his ideas were derived from the works of Ctesibius[?].

A number of references mention dates around 150 BC, but these are inconsistent with the dates of his publications and inventions. Perhaps this is due to a misinterpretation of the phrase "first century".

Publications

The complete surviving works are:
  • Pneumatica (Greek, c. A.D. 60)
  • Automata (Greek)
  • Mechanics (Arabic)
  • Metrics (Arabic)
  • Dioptra (Arabic)

In optics, Hero proposed that light travels along the shortest geometric path. This view is no longer accepted, having been replaced by least-time principle.

In geometry, he wrote down the formula (Heron's formula) for calculating the area of a triangle in terms of its sides.

Projects

  • compressed-air fountain
  • siphons
  • automated puppets
  • machine for threading wooden screws
  • steam turbine (A.D. 50/62/70) (aeolipile)
  • density of air
  • water organ or hydraulic organ
  • odometer

References

The Technology Museum of Thessaloniki has a good web page on Hero at http://www.tmth.edu.gr/en/aet/5/55.



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
  Search Encyclopedia

Search over one million articles, find something about almost anything!
 
 
  
  Featured Article
Bugatti

... car, the huge "Royale[?]", and the Type 55 sports car. Bugatti also designed a successful motorized railcar, the Autorail, and an airplane, but it never flew. Ettore ...

 
 
 
This page was created in 36.1 ms