Philo of Byzantium

Philo of Byzantium

Philo of Byzantium (Greek: Φίλων ο Βυζάντιος, ca. 280 BCE - ca. 220 BCE), also known as Philo Mechanicus, a Greek writer on mechanics, flourished during the latter half of the 2nd century B.C. He was probably younger than Ctesibius, though some place him a century earlier.

Life and works

Philo was the author of a large work, "Mechanike syntaxis" (Compendium of Mechanics), which contained the following sections:
* "Isagoge" - an introduction to mathematics.
* "Mochlica" - on general mechanics.
* "Limenopoeica" - on harbour building.
* "Belopoeica" - on artillery.
* "Pneumatica" - on devices operated by air or water pressure.
* "Automatiopoeica" - on mechanical toys and diversions.
* "Poliorcetica" - on siegecraft
* "Peri Epistolon" - on secret letters

The military sections "Belopoeica" and "Poliorcetica" are extant in Greek, detailing missiles, the construction of fortresses, provisioning, attack and defence, as are fragments of "Isagoge" and "Automatiopoeica" (ed. R. Schone, 1893, with German translation in Hermann August Theodor Köchly's "Griechische Kriegs-schriftstelle", vol. i. 1853; E. A. Rochas d'Aiglun," Poliorcetique des Grecs", 1872).

Another portion of the work, on pneumatic engines, has been preserved in the form of a Latin translation ("De ingeniis spiritualibus") made from an Arabic version (ed. W. Schmidt, with German translation, in the works of Heron of Alexandria, vol. i., in the Teubner series, 1899; with French translation by Rochas, "La Science des philosophes... dans l'antiquité", 1882). Further portions probably survive in a derivative form, incorporated into the works of Vitruvius and of Arabic authors.

The Philo line, a geometric construction that can be used to double the cube, is attributed to Philo.

The treatise "De septem mundi miraculis", on the Seven Wonders of the World, wrongly attributed to Philo, probably belongs to the 6th century A.D. It is printed in R. Hercher's edition of Aelian (Teubner, 1858).

Devices

According to recent research, a section of Philo's "Pneumatics" which so far has been regarded as a later Arabic interpolation, includes the first description of a water mill in history, [M. J. T. Lewis, "Millstone and Hammer: the origins of water power" (University of Hull Press 1997), pp. 1-73 especially 44-45 and 58-60] placing the invention of the water mill in the mid-third century B.C. by the Greeks. [Andrew Wilson, "Machines, Power and the Ancient Economy", "The Journal of Roman Studies", Vol. 92. (2002), pp. 1-32 (7f.)]

Philon's works also contain the oldest known application of a chain drive in a repeating crossbow. Two flat-linked chains were connected to a windlass, which by winding back and forth would automatically fire the machine's arrows until its magazine was empty. [Werner Soedel, Vernard Foley: "Ancient Catapults", "Scientific American", Vol. 240, No. 3 (March 1979), pp. 124-125.]

Philon also was the first to describe a gimbal: an eight-sided ink pot with an opening on each side could be turnt so that any face is on top, dip in a pen and ink it-yet the ink never runs out through the holes of the side. This was done by the suspension of the inkwell at the center, which was mounted on a series of concentric metal rings which remained stationary no matter which way the pot turns itself. [Sarton, G. "A History of Science, The Norton Library" (Volume 2), 1970, pp. 343-350.]

Mathematics

In mathematics, Philo tackled the problem of doubling the cube. The doubling of the cube was necessitated by the following problem, given a catapult, construct a second catapult that is capable of firing a projectile twice as heavy as the projectile of the first catapult. His solution was to find the point of intersection of a rectangular hyperbola and a circle, a solution that is similar to Heron's solution several centuries later.

ee also

*Chain pump

References

External links

*
* [http://www.history-of-physics.com/en/antike/griechenland_vogel.htm Shockwave-Animation: Philons "Bird and snake"]


Wikimedia Foundation. 2010.

Игры ⚽ Нужно решить контрольную?

Look at other dictionaries:

  • Philo (disambiguation) — The name Philo can refer to a number of things, including:* Philo (see phil ), a prefix and suffix, and a combining form, derived from the Greek, which means love of (e.g. Philosophy or Philadelphia)People* Philon (c. 4th century BC), an Athenian …   Wikipedia

  • Philo line — In geometry, the Philo line is a line segment defined from an angle and a point. The Philo line for a point P that lies inside an angle with edges d and e is the shortest line segment that passes through P and has its endpoints on d and e . Also… …   Wikipedia

  • Byzantium — This article is about the city. See also Byzantine Empire. Byzantium (Greek: Βυζάντιον, Latin: la. BYZANTIVM, la. Byzantium) was an ancient Greek city, which was founded by Greek colonists from Megara in 667 BC and named after their king Byzas or …   Wikipedia

  • Hero of Byzantium — is believed to be the literary pseudonym of an otherwise anonymous Byzantine author of a poliorketikon, an illustrated manual of siegecraft, dating from circa 950. He is also credited with the Geodaesia , a work in practical geometry and… …   Wikipedia

  • Herennius Philo — Herennius Philo, of Byblos, Greek grammarian, was born, according to the Suda, in AD 42. He lived into the reign of Hadrian, of which he wrote a history, now lost.He was the author of various works: * On the Acquisition and Choice of Books * On… …   Wikipedia

  • List of Chinese inventions — A bronze Chinese crossbow mechanism with a buttplate (the wooden components have …   Wikipedia

  • Colossus of Rhodes — This article is about the statue. For the film by Sergio Leone, see Il Colosso di Rodi. For the children s novel, see The Colossus of Rhodes (novel). For the basketball club, see Kolossos Rodou BC. Drawing of Colossus of Rhodes, illustrated in… …   Wikipedia

  • Robot — This article is about mechanical robots. For other uses of the term, see robot (disambiguation). For software agents, see Bot. ASIMO (2000) at the Expo 2005, a humanoid robot …   Wikipedia

  • Water clock — For the individual water clock at The Children s Museum of Indianapolis, see Water clock (Indianapolis). A display of two outflow water clocks from the Ancient Agora Museum in Athens. The top is an original from the late 5th century BC. The… …   Wikipedia

  • Polybolos — The polybolos (from Ancient Greek πολυβόλος , from πολύς polys many, much + βάλλω ballo to throw, to hurl ) was a repeating ballista reputedly invented by Dionysius of Alexandria Fact|date=August 2007 and used in antiquity. Philo of Byzantium… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”