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. Author: Eric W. Weisstein

2. Heron Of Alexandria heron of alexandria. c 152 BC, Alexandria. c 82 BC, Egypt? 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

3. History Of Computing Heron Of Alexandria heron of alexandria. picture . principal papers. N/A 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.

4. Heron Of Alexandria Hero (or Heron) of Alexandria. Hero's aeolipile. heron of alexandria was born in 75 AD. http://alexandrias.tripod.com/hero.htm

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

5. Heron Of Alexandria Pronunciation Key. heron of alexandria or Hero, mathematician and inventor. http://www.infoplease.com/ce6/people/A0823538.html

The # 1 wireless color security cam! Ultimate home movie ! Genuine Indian and Asian astrology reports and consultations by reputed Vedic Astrologers. Step-by-step guide to finding money for a growing business All Infoplease All Almanacs General Entertainment Sports Biographies Dictionary Encyclopedia Infoplease Home Almanacs Atlas Dictionary ... Fact Monster Kids' reference Info:Daily Fun facts Homework Center Newsletter You've got info! Help Site Map Visit related sites from: Family Education Network 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. heron Herophilus Search Infoplease Info search tips Search Biographies Bio search tips About Us Contact Us Link to Infoplease ... Privacy

6. Heron heron of alexandria. Born about Sometimes called Hero, heron of alexandriawas 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

7. Heron Biography of heron of alexandria (1075) heron of alexandria. Born about 10 in (possibly) Alexandria, Egypt 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

8. References For Heron References for heron of alexandria. 20 (2) (1993), 180192. JG Smyly,Square roots in heron of alexandria, Hermathena 63 (1944), 18-26. http://www-gap.dcs.st-and.ac.uk/~history/References/Heron.html

References for Heron of Alexandria Biography in Dictionary of Scientific Biography (New York 1970-1990). Biography in Encyclopaedia Britannica. Books: M Cantor, I (Leipzig, 1908). A G Drachmann, Ktesibios, Philon, and Heron, a Study in Ancient Pneumatics T L Heath, A history of Greek mathematics I, II (Oxford, 1931). J L Heiberg, Heronis Alexandrini Opera quae supersunt omnia (Leipzig, 1912). O Neugebauer, A history of ancient mathematical astronomy (New York, 1975). I Thomas, Selections illustrating the history of Greek mathematics II (London, 1941). Articles: Elem. Math. A G Drachmann, Fragments from Archimedes in Heron's Mechanics, Centaurus A G Drachmann, Heron and Ptolemaios, Centaurus Rev. Histoire Sci. Appl. J Hoyrup, The position of Heron's formula in the Metrica (with a note about Plato) (Italian), Boll. Storia Sci. Mat. P Keyser, A new look at Heron's "steam engine", Arch. Hist. Exact Sci. Historia Math. J G Smyly, Square roots in Heron of Alexandria, Hermathena C M Taisbak, An Archimedean proof of Heron's formula for the area of a triangle; reconstructed, Centaurus C M Taisbak, Errata: An Archimedean proof of Heron's formula for the area of a triangle; reconstructed

9. Heron Of Alexandria (ca. 75 AD) -- From Eric Weisstein's World Of Scientific Bio heron of alexandria (ca. 75 AD), Greek mathematician who was mainlyinterested 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. Author: Eric W. Weisstein

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 heron of alexandria, a worldrenowned mathematician was born in 65 AD in Alexandria, Egypt. http://www.mchschool.org/~jsrour/mathematicians/heron.htm

Heron of Alexandria 65 C.E.-Unknown by Jessica R. and Jamie P. Heron of Alexandria, a world-renowned mathematician was born in 65 AD in Alexandria, Egypt. Otherwise known as Hero, Heron was an important geometer who strongly influenced the science of mechanics. He is most notable for working with triangles, quadrilaterals, polygons (between three and twelve sides), surfaces of cones, cylinders, prisms, pyramids, spheres and other mathematical concepts. His most noted theory or formula is known as Hero’s formula and involves this basic equation: If A is the area of a triangle with sides a, b and c, and s = (a+b+c)/2 , Then A = sqrt [ s(s-a) (s-b) (s-c) ]. He is also famous for writing his trilogy known as the treatise Metrica www.ask.com/heron/mathematicians A Proof of the Pythagorean Theorem From Heron's Formula Let the sides of a triangle have lengths a b and c . Introduce the semi-perimeter p a b c )/2 and the area A . Then Heron's formula asserts that p p a p b p c W.Dunham analyzes the original Heron's proof in his Journey through Genius. For the right triangle with hypotenuse c , we have A ab /2. We will modify the right hand side of the formula by noting that

12. Heron Of Alexandria. The Columbia Encyclopedia, Sixth Edition. 2001 The Columbia Encyclopedia, Sixth Edition. 2001. heron of alexandria.(h r´ n) (KEY) or Hero, mathematician and inventor. The dates http://www.bartleby.com/65/he/HeronAle.html

Select Search All Bartleby.com All Reference Columbia Encyclopedia World History Encyclopedia 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 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

13. Heron Of Alexandria. The Columbia Encyclopedia, Sixth Edition. 2001 heron of alexandria. (h r´ n) (KEY) or Hero, mathematician and inventor. http://www.bartelby.com/65/he/HeronAle.html

Select Search All Bartleby.com All Reference Columbia Encyclopedia World History Encyclopedia 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 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

14. Heron Of Alexandria SOME PIONEERS IN AIR ENGINE DESIGN. heron of alexandria. Some of theearliest 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

15. Heron Of Alexandria And His Motor back to list, heron of alexandria and His Motor. Q Also, here's a link to a reallygood page all about heron of alexandria. Good luck with your project! Tamara. http://van.hep.uiuc.edu/van/qa/section/Everything_Else/History/950749321.htm

back to list Heron of Alexandria and His Motor Q: Do you have any info. about "Hero's Motor"? I'm doing a science fair project on the "Hero's Fountain" and I would also like some information about "Hero" and some of his inventions. Thanks. Braydon (age 14) Lockerby Composite Sudbury A: Braydon - Although he's often called Hero, his actual name was Heron. He lived in Alexandria, Egypt in the first century A.D. (From around 10 A.D. to around 75 A.D., probably.) He was a mathematician and inventor, and he focused on geometry and things that had to do with water and air pressure. He's most famous for Heron's Formula, which has to do with the lengths of the sides of triangles. He wrote a lot of books about his work, many of which were stored in the Library of Alexandria. This library is pretty famous because it was lost, so to speak, during wars in that area, and the books inside weren't found until nearly a thousand years later. He came up with a lot of inventions, including what he called the aeolipile, which was the first ever steam-based motor. It was basically a metal ball that could turn on a metal tube that ran through it. It had two bent pipes sticking out opposite sides. Steam came in through the tube in the middle and went out through the pipes on the sides. The steam pushing out through the holes in the sides made the ball spin. Unfortunately, no one ever really used this motor. For more information about Hero's Fountains, check out our answer to the question about that. You can get to it under the Cool Stuff About Air: Water section of our questions list.

16. ®ü­Û¡]Heron Of Alexandria, ¤½¤¸62¦~¥ª¥k¡^ The summary for this Chinese (Traditional) page contains characters that cannot be correctly displayed in this language/character set. http://www.edp.ust.hk/math/history/3/3_86.htm

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17. ¤Hª« (Apollonius of Perga), (heron of alexandria).?(Diohantus of Alexandria), ?(Pappus of Alexandria). http://www.edp.ust.hk/math/history/3/

ªð¦^¥D­¶ ¼Æ¾Ç¥v¦~ªí ¤¤¥~¼Æ¾Ç¥v ¤Hª« »y¿ý ¾Ç¬ì¥v ¦WD»P²q·Q ÄvÁÉ»P¼ú¶µ µØ»y¤åÄm¯Á¤Þ ¾¥¤l ´f¬I ±i»a ¼BÝõ ... §JµÜ¦] ¡A¢Û¡D¢Û¡D¡]Kline, Morris¡^

18. Heron Of Alexandria heron of alexandria mathematician and inventor. The dates of his birth and deathare unknown; conjecture places them between the 2d cent. heron of alexandria. http://www.slider.com/enc/24000/Heron_of_Alexandria.htm

SubmitWolf - Award winning Internet Software Home Encyclopeadia H Hen - Her ... Rope Ladders Trellian WebPage Slider Search: The Web Encyclopaedia Shopping Index Help Encyclopaedia Heron of Alexandria 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. Add URL Advertise Contact Us

19. Hero, Greek Mathematician The Web, Index. Help. Encyclopaedia. Hero, Greek mathematician. Greek mathematiciansee heron of alexandria. heron of alexandria. http://www.slider.com/enc/24000/Hero_Greek_mathematician.htm

Home Encyclopeadia H Hen - Her ... Rope Ladders Trellian WebPage Slider Search: The Web Encyclopaedia Shopping Index Help Encyclopaedia Hero, Greek mathematician Greek mathematician: see Heron of Alexandria Add URL Advertise Contact Us ... Heron of Alexandria

20. ThinkQuest Library Of Entries Although there were about 18 Greek writers under the name of Hero or Heron,this specific Greek scientist was known as Hero or heron of alexandria. http://library.thinkquest.org/C006011/english/sites/heron_bio.php3?v=2

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