1. Heron Of Alexandria (ca. 75 AD) -- From Eric Weisstein's World Of Scientific Bio Greek mathematician who was mainly interested in practical studies in mechanics and engineering, best known for Heron's Formula http://www.treasure-troves.com/bios/Heron.html

Branch of Science Mathematicians Nationality Greek Heron of Alexandria (ca. 75 AD) Greek mathematician who was mainly interested in practical studies in mechanics and engineering. He dealt with a number of such problems in his work Dioptra. He is best known today for Proposition 1.8 of his Metrica, which is now known as Heron's formula The manuscript had been lost for centuries until a fragment was discovered in 1894, followed by a complete copy in 1896. References Dunham, W. Journey Through Genius: The Great Theorems of Mathematics. New York: Wiley, pp. 117-118, 1990.

2. Heron Of Alexandria --  Encyclopædia Britannica MLA style " heron of alexandria." Encyclopædia Britannica. 2004 APA style heron of alexandria. Encyclopædia Britannica. Retrieved May 12, 2004, from Encyclopædia Britannica http://www.britannica.com/eb/article?eu=41048

3. Heron Of Alexandria heron of alexandria. c 152 BC, Alexandria. c 82 BC, Egypt? or Hiero, was a scientist and inventor in Alexandria. Heron wrote many books on mathematics, physics, geometry http://www.thocp.net/biographies/heron_alexandria.html

Heron of Alexandria c 152 BC, Alexandria c 82 BC, Egypt? principal papers hardware software keywords hydraulics, steam engine, mathematics see also Related Subjects Achievement Heron, or Hiero, was a scientist and inventor in Alexandria. Heron wrote many books on mathematics, physics, geometry, and mechanics. The 'Pneumatica' describes mechanical devices operated by compressed air, water or steam, such as a fire engine, a water organ, and the aeolipile, which is the first steam-powered engine. His device consisted of a sphere mounted on a boiler by an axial shaft and having two canted nozzles to produce a rotary motion from the escaping steam. The later steam engines of the 18th century were partly based on this design. Biography Chronology Honors and awards Last Updated on June 18, 2001 For suggestions please mail the editors

4. History Of Computing Heron Of Alexandria heron of alexandria. c 152, Alexandria. c 82 BC Egypt? Heron, or Hiero, was a scientist and inventor in Alexandria. Heron wrote many books on mathematics, physics, geometry http://www.thocp.net/slideshow/heron.html

Heron of Alexandria c 152, Alexandria c 82 BC Egypt? no picture available principal papers N/A hardware N/A terms hydraulics, steam engine, mathematics Heron, or Hiero, was a scientist and inventor in Alexandria. Heron wrote many books on mathematics, physics, geometry, and mechanics. The 'Pneumatica' describes mechanical devices operated by compressed air, water or steam, such as a fire engine, a water organ, and the aeolipile, which is the first steam-powered engine. His device consisted of a sphere mounted on a boiler by an axial shaft and having two canted nozzles to produce a rotary motion from the escaping steam. With this steam engine one opened the gates of the temple or town. The later steam engines of the 18th century (Thomas Watt) were partly based on this design.

5. Heron Of Alexandria. The Columbia Encyclopedia, Sixth Edition. 2001 The Columbia Encyclopedia, Sixth Edition. 2001. heron of alexandria. D. He is believed to have lived in Alexandria; although he wrote in Greek, his origin is uncertain http://www.bartleby.com/65/he/HeronAle.html

Select Search All Bartleby.com All Reference Columbia Encyclopedia World History Encyclopedia Cultural Literacy World Factbook Columbia Gazetteer American Heritage Coll. Dictionary Roget's Thesauri Roget's II: Thesaurus Roget's Int'l Thesaurus Quotations Bartlett's Quotations Columbia Quotations Simpson's Quotations Respectfully Quoted English Usage Modern Usage American English Fowler's King's English Strunk's Style Mencken's Language Cambridge History The King James Bible Oxford Shakespeare Gray's Anatomy Farmer's Cookbook Post's Etiquette Bulfinch's Mythology Frazer's Golden Bough All Verse Anthologies Dickinson, E. Eliot, T.S. Frost, R. Hopkins, G.M. Keats, J. Lawrence, D.H. Masters, E.L. Sandburg, C. Sassoon, S. Whitman, W. Wordsworth, W. Yeats, W.B. All Nonfiction Harvard Classics American Essays Einstein's Relativity Grant, U.S. Roosevelt, T. Wells's History Presidential Inaugurals All Fiction Shelf of Fiction Ghost Stories Short Stories Shaw, G.B. Stein, G. Stevenson, R.L. Wells, H.G. Reference Columbia Encyclopedia PREVIOUS NEXT ... BIBLIOGRAPHIC RECORD The Columbia Encyclopedia, Sixth Edition. Heron of Alexandria (h n) ( KEY ) or Hero

6. Bowie Wonderworld Columnists: Black Owl - Heron Of Alexandria black owl heron of alexandria Black Owl. heron of alexandria (ca. 75 AD surprised to discover (if you don't know already) what heron of alexandria invented. Leonard De Vinci is his son in a http://www.bowiewonderworld.com/cols/blackowl05.htm

Black Owl HERON OF ALEXANDRIA (ca. 75 AD) I know this latest column is not about David Bowie, but if you are curious about history and mathematics, you would be surprised to discover (if you don't know already) what Heron of Alexandria invented. Leonard De Vinci is his son in a way. Heron built a lot of machines especially for priests. There were a huge concurrence between religions in Egypt and every priest tried to find a solution to attract people 'cause they needed money. Heron built doors who could be opened automatically, people were impressed and thought it was magical, but in reality it was a mechanism used by priests. Look here... Black Owl June 18th 2003. CLICK HERE TO CLOSE WINDOW

7. Heron heron of alexandria. Born about Sometimes called Hero, heron of alexandria was an important geometer and worker in mechanics. Perhaps the http://www-gap.dcs.st-and.ac.uk/~history/Mathematicians/Heron.html

Heron of Alexandria Born: about 10 in (possibly) Alexandria, Egypt Died: about 75 Click the picture above to see two larger pictures Previous (Chronologically) Next Biographies Index Previous (Alphabetically) Next Main index Sometimes called Hero, Heron of Alexandria was an important geometer and worker in mechanics. Perhaps the first comment worth making is how common the name Heron was around this time and it is a difficult problem in the history of mathematics to identify which references to Heron are to the mathematician described in this article and which are to others of the same name. There are additional problems of identification which we discuss below. A major difficulty regarding Heron was to establish the date at which he lived. There were two main schools of thought on this, one believing that he lived around 150 BC and the second believing that he lived around 250 AD. The first of these was based mainly on the fact that Heron does not quote from any work later than Archimedes . The second was based on an argument which purported to show that he lived later that Ptolemy , and, since Pappus refers to Heron, before

8. Heron Of Alexandria (ca. 75 AD) -- From Eric Weisstein's World Of Scientific Bio heron of alexandria (ca. 75 AD), Greek mathematician who was mainly interested in practical studies in mechanics and engineering. http://scienceworld.wolfram.com/biography/Heron.html

Branch of Science Mathematicians Nationality Greek Heron of Alexandria (ca. 75 AD) Greek mathematician who was mainly interested in practical studies in mechanics and engineering. He dealt with a number of such problems in his work Dioptra. He is best known today for Proposition 1.8 of his Metrica, which is now known as Heron's formula The manuscript had been lost for centuries until a fragment was discovered in 1894, followed by a complete copy in 1896. References Dunham, W. Journey Through Genius: The Great Theorems of Mathematics. New York: Wiley, pp. 117-118, 1990.

9. Heron Biography of heron of alexandria (1075) heron of alexandria. Born about 10 in (possibly) Alexandria, Egypt Sometimes called Hero, heron of alexandria was an important geometer and worker in http://www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Heron.html

Heron of Alexandria Born: about 10 in (possibly) Alexandria, Egypt Died: about 75 Click the picture above to see two larger pictures Previous (Chronologically) Next Biographies Index Previous (Alphabetically) Next Main index Sometimes called Hero, Heron of Alexandria was an important geometer and worker in mechanics. Perhaps the first comment worth making is how common the name Heron was around this time and it is a difficult problem in the history of mathematics to identify which references to Heron are to the mathematician described in this article and which are to others of the same name. There are additional problems of identification which we discuss below. A major difficulty regarding Heron was to establish the date at which he lived. There were two main schools of thought on this, one believing that he lived around 150 BC and the second believing that he lived around 250 AD. The first of these was based mainly on the fact that Heron does not quote from any work later than Archimedes . The second was based on an argument which purported to show that he lived later that Ptolemy , and, since Pappus refers to Heron, before

10. Heron Of Alexandria, Greece, Ancient History heron of alexandria. Great inventor, mathematician and physicist from Alexandria, Egypt, who wrote books on mathemathics, mechanics and physics. http://www.in2greece.com/english/historymyth/history/ancient/heron_alexandria.ht

Heron of Alexandria Great inventor, mathematician and physicist from Alexandria, Egypt, who wrote books on mathemathics, mechanics and physics. Heron studied the preassure of air and steam, and built the first steamengine and toys that would spurt water, one of them known as Heron's fountain. He also developed various instruments for measuring distances and roads, and is sometimes credited with the formula that defines the area of a triangle from its sides. Other remarkable inventions of his was a fire extinguisher and a machine from which you could purchase various producs. Webmistress V.E.K. Sandels Home Who is Who in ... -Antigonos Gonatas -Antigonos Monophtalmos -Antipater -Antisthenes -Anyte -Apelles ... -Zeuxis

11. Heron Of Alexandria, Inventions, Biography, Science heron of alexandria. Sequence Control. heron of alexandria described a mechanism or apparatus that made use of the so called sequence control mechanism. http://www.mlahanas.de/Greeks/HeronAlexandria.htm

Heron of Alexandria Translate: Heron from Alexandria was a Mathematician, Physicist and Engineer who lived in 10-70 AD but some references consider also 150 AD which is probably wrong, as in one of his works he referred to a recent eclipse which is now thought to have occurred in 62 AD . From Heron's writings it is reasonable to deduce that he taught at the Museum in Alexandria. His origin is uncertain although he wrote in Greek on the measurement of geometric figures and invented many contrivances operated by water, steam, or compressed air, including a fountain and a fire engine. Known as Michanikos, the Machine Man, Heron invented the world's first steam engine, developed some sophisticated surveying tools, and crafted handy gizmos like a self-trimming oil lamp. Technically speaking, Heron's clever inventions were particularly notable for their incorporation of the sorts of self-regulating feedback control systems that form the bedrock of cybernetics; like today's toilets, his "inexhaustible goblet" regulated its own level with a floating mechanism. But what really stirred Heron's soul were novelties: pneumatic gadgets, automata, and magic theaters, one of which rolled itself before the audience on its own power, cranked through a miniature three-dimensional performance, and then made its own exit. Another staged a Dionysian mystery rite with Apollonian precision: Flames lept, thunder crashed, and miniature female Bacchantes whirled madly around the wine god on a pulley-driven turntable.

12. Heron's Mathematics The answer is the definitions are not Euclid’s. Toward the beginning of the second century AD heron of alexandria found it convenient to introduce http://www.mlahanas.de/Greeks/HeronsMath.htm

Heron's Mathematics Sandro Graffi Let a,b,c be the sides of a triangle, and let A be the area of the triangle. Heron's formula states that A*A = s(s-a)(s-b)(s-c), where s = (a+b+c)/2. The actual origin of this formula is somewhat obscure historically, and it may well have been known for centuries prior to Heron. For example, some people think it was known to Archimedes. However, the first definite reference we have to this formula is Heron's. His proof of this result is extremely circuitious, and it seems clear that it must have been found by an entirely different thought process, and then "dressed up" in the usual synthetic form that the classical Greeks preferred for their presentations. For a proof see Dr. McCrory Foundation of Geometry lecture: An algebraic proof of Heron's Formula A geometric proof of Heron's Formula . This proof is based on Heron's proof of the formula in Metrica A trigonometric proof of Heron's Formula A triangle with integer edge lengths and integer area is called Heronian Heron's division of a triangle Heron provided a solution in Metrica for the geometric problem to divide a triangle in two pieces of the same area given a point D on a side of the triangle. If this point is on the middle of the side (point M) then the line MC divides the triangle in two pieces of the same area. For some other point D first get the parallel ME of the line DC. This parallel cuts the triangle in the point E. Then ED is the line that cuts the triangle in two pieces with the same area.

13. Heron Of Alexandria Hero (or Heron) of Alexandria. Hero's aeolipile. heron of alexandria was born in 75 AD. He is a Greek mathematician but his interests are in engineering and mechanics. http://alexandrias.tripod.com/hero.htm

var cm_role = "live" var cm_host = "tripod.lycos.com" var cm_taxid = "/memberembedded" Don't forget to visit our discussion forum!!! Hero (or Heron) of Alexandria Hero's aeolipile Heron of Alexandria was born in 75 AD. He is a Greek mathematician but his interests are in engineering and mechanics. He has written at least 13 works on mathematics, mechanics and physics. His most famous work today in math is Proposition 1.8 of his Metrica, which is known as the Heron Formula He also invented the first steam turbine, called the aeolipile. At that time it was used as a toy. A hollow ball was supported on two brackets on the lid of a basin of boiling water. One bracket was hollow and conducted steam. The steam escaped from two bent pipes on the top, therefore creating a force that made it spin around. The movement of the ball was used to make puppets dance. Although it was very simple, Hero's aeolipile illustrated the scientific principle for Sir Isaac Newton's third law of motion which states that for every action there is an equal and opposite reaction. Hero's steam engine helped a great deal with the development of the jet engine. Even though Hero invented many useful items and discovered many math formulas

14. Heron Of Alexandria --  Encyclopædia Britannica heron of alexandria Encyclopædia Britannica Article. To cite this page MLA style heron of alexandria. Encyclopædia Britannica. 2004. http://www.britannica.com/eb/article?eu=41048&tocid=0&query=alexandria

15. Hero Of Alexandria - Wikipedia, The Free Encyclopedia Hero of Alexandria. (Redirected from heron of alexandria). Hero (or Heron) of Alexandria (roughly AD 10 to roughly AD 70) was a Greek engineer and geometer. http://en.wikipedia.org/wiki/Heron_of_Alexandria

Hero of Alexandria From Wikipedia, the free encyclopedia. (Redirected from Heron of Alexandria Hero (or Heron of Alexandria (roughly A.D. to roughly A.D. ) was a Greek engineer and geometer. 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". edit Publications The complete surviving works are: Pneumatica (Greek, c. A.D. 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 the least-time principle. In geometry , he stated and proved a formula, now known as Heron's formula , for calculating the area of a triangle in terms of its sides. He also came up with an iterative process for calculating square roots of numbers. Hero is credited with inventing many feedback control devices using water, fire and compressed air in various combinations, and the first type of analogue

16. Heron Of Alexandria SOME PIONEERS IN AIR ENGINE DESIGN. heron of alexandria. Some of the earliest examples of machines powered by heated air can be found http://www.stirlingengines.org.uk/pioneers/pion.html

SOME PIONEERS IN AIR ENGINE DESIGN Heron of Alexandria Some of the earliest examples of machines powered by heated air can be found in a treatise on Pneumatics written around 50AD by Hero, who was possibly a Greek, who lived in the Egyptian city of Alexandria. This work was translated from the Greek in to English by Bennet Woodcroft and published in 1851. An on line copy can be down loaded from Rochester University

17. Heron Of Alexandria - Encyclopedia Article About Heron Of Alexandria. Free Acces encyclopedia article about heron of alexandria. heron of alexandria in Free online English dictionary, thesaurus and encyclopedia. heron of alexandria. http://encyclopedia.thefreedictionary.com/Heron of Alexandria

Dictionaries: General Computing Medical Legal Encyclopedia Heron of Alexandria Word: Word Starts with Ends with Definition Hero (or Heron of Alexandria (roughly A.D. Alternate uses, see Number 10, ten (album) Centuries: 1st century BC - 1st century - 2nd century Decades: 30s BC 20s BC 10s BC 0s BC 0s - Years: 5 6 7 8 9 - Events Differentiation of localized Teutonic tribes of the Irminones. The Greek dynasty in Bactria is extinguished. Publius Cornelius Dolabella is a Roman Consul. Illyria is divided into Pannonia and Dalmatia. Click the link for more information. to roughly A.D. Alternate uses, see Number 70 Centuries: 1st century BC - 1st century - 2nd century Decades: 20s 30s 40s 50s 60s - Years: 65 66 67 68 69 - Events The building of the Colosseum starts (approximate date). Pliny the Elder served as procurator in Gallia Narbonensis The Roman general and future Roman Emperor, Titus Flavius, destroy the Temple in Jerusalem, leaving erect only the famous Wailing Wall. Rome stations troops in Jerusalem and abolishes the Jewish high priesthood and Sanhedrin. This becomes known as the Fall of Jerusalem. Click the link for more information.

18. Hero Of Alexandria - Encyclopedia Article About Hero Of Alexandria. Free Access, s=\\frac. (see also square root). History. The formula is credited to heron of alexandria in the 1st century AD, and a proof can be found in his book Metrica. http://encyclopedia.thefreedictionary.com/Hero of Alexandria

Dictionaries: General Computing Medical Legal Encyclopedia Hero of Alexandria Word: Word Starts with Ends with Definition Hero (or Heron of Alexandria (roughly A.D. Alternate uses, see Number 10, ten (album) Centuries: 1st century BC - 1st century - 2nd century Decades: 30s BC 20s BC 10s BC 0s BC 0s - Years: 5 6 7 8 9 - Events Differentiation of localized Teutonic tribes of the Irminones. The Greek dynasty in Bactria is extinguished. Publius Cornelius Dolabella is a Roman Consul. Illyria is divided into Pannonia and Dalmatia. Click the link for more information. to roughly A.D. Alternate uses, see Number 70 Centuries: 1st century BC - 1st century - 2nd century Decades: 20s 30s 40s 50s 60s - Years: 65 66 67 68 69 - Events The building of the Colosseum starts (approximate date). Pliny the Elder served as procurator in Gallia Narbonensis The Roman general and future Roman Emperor, Titus Flavius, destroy the Temple in Jerusalem, leaving erect only the famous Wailing Wall. Rome stations troops in Jerusalem and abolishes the Jewish high priesthood and Sanhedrin. This becomes known as the Fall of Jerusalem. Click the link for more information.

19. Heron Of Alexandria encyclopediaEncyclopedia heron of alexandria, hEr on Pronunciation Key. Related content from HighBeam Research on heron of alexandria. http://www.infoplease.com/cgi-bin/id/A0823538.hmtl

HOTWORDS CITE PRINT EMAIL in All Infoplease Almanacs Biographies Dictionary Encyclopedia Home Almanacs Atlas Dictionary ... D-Day Infoplease Tools Periodic Table Conversion Tool Perpetual Calendar Year by Year ... Site Map Also from Infoplease Search Infoplease Info search tips Search Biographies Bio search tips Encyclopedia Heron of Alexandria [h E Pronunciation Key Heron of Alexandria or Hero, mathematician and inventor. The dates of his birth and death are unknown; conjecture places them between the 2d cent. B.C. and the 3d cent. A.D. He is believed to have lived in Alexandria; although he wrote in Greek, his origin is uncertain. Several of his works survive either in Greek or in Latin translation. He wrote on the measurement of geometric figures, and a formula for finding the area of a triangle has been ascribed to him. Known for his study of mechanics and pneumatics, he invented many contrivances operated by water, steam, or compressed air; these include a fountain, a fire engine, siphons, and an engine in which the recoil of steam revolves a ball or a wheel. The Columbia Electronic Encyclopedia

20. AllRefer Encyclopedia - Heron Of Alexandria (Mathematics, Biographies) - Encyclo AllRefer.com reference and encyclopedia resource provides complete information on heron of alexandria, Mathematics, Biographies. http://reference.allrefer.com/encyclopedia/H/HeronAle.html

AllRefer Channels :: Health Yellow Pages Reference Weather SEARCH : in Reference May 31, 2004 You are here : AllRefer.com Reference Encyclopedia Mathematics, Biographies ... Heron of Alexandria By Alphabet : Encyclopedia A-Z H Heron of Alexandria, Mathematics, Biographies Related Category: Mathematics, Biographies Heron of Alexandria [h E Pronunciation Key or Hero, mathematician and inventor. The dates of his birth and death are unknown; conjecture places them between the 2d cent. B.C. and the 3d cent. A.D. He is believed to have lived in Alexandria; although he wrote in Greek, his origin is uncertain. Several of his works survive either in Greek or in Latin translation. He wrote on the measurement of geometric figures, and a formula for finding the area of a triangle has been ascribed to him. Known for his study of mechanics and pneumatics, he invented many contrivances operated by water, steam, or compressed air; these include a fountain, a fire engine, siphons, and an engine in which the recoil of steam revolves a ball or a wheel. Topics that might be of interest to you: mathematics Encyclopedia U com Check out around 175,000 brief encyclopedia articles on almost all topics.

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