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Topic: Edward Mills Purcell

	Chemistry - Edward Mills Purcell
		Edward Mills Purcell (August 30, 1912 - March 7, 1997) was an American physicist who shared the 1952 Nobel Prize for Physics for his independent discovery (1946) of nuclear magnetic resonance in liquids and in solids.
		Purcell also made contributions to astronomy as the first to detect radio emissions from neutral galactic hydrogen, affording the first views of the spiral arms of the Milky Way.
		Purcell was the recipient of many awards for his scientific, educational, and civic work.
	www.chemistrydaily.com /chemistry/Edward_Mills_Purcell (413 words)

	Edward Mills Purcell - Wikipedia, the free encyclopedia
		Edward Mills Purcell (August 30, 1912 - March 7, 1997) was an American physicist who shared the 1952 Nobel Prize for Physics for his independent discovery (1946) of nuclear magnetic resonance in liquids and in solids.
		Purcell also made contributions to astronomy as the first to detect radio emissions from neutral galactic hydrogen, affording the first views of the spiral arms of the Milky Way.
		Purcell was the recipient of many awards for his scientific, educational, and civic work.
	en.wikipedia.org /wiki/Edward_Mills_Purcell (471 words)

	Edward Mills Purcell, August 30, 1912March7, 1997 \| By Robert V. Pound \| Biographical Memoirs
		Edward M. Purcell was born on August 30, 1912, in Taylorville, Illinois, the older of two boys.
		His father, Edward A. Purcell, was manager of the local telephone exchange in Taylorville, and moved, when the boy Edward was fourteen years of age, to Matoon, Illinois, some 60 miles southeast to become general manager of the Illinois Southeastern Telephone Company, an independent regional company.
		Purcell applied to the Rumford Fund of the American Academy of Arts and Sciences for support in the amount of $500, with which he was able to construct the horn antenna and carry out the project.
	books.nap.edu /html/biomems/epurcell.html (5530 words)

	Dr. E.M. Purcell, 84, Shared Nobel for Work on Hydrogen
		Edward M. Purcell, who made it possible to "listen" to the whisperings of hydrogen throughout the universe, died Friday in Cambridge, Mass.
		Edward Mills Purcell was born in Taylorville, Ill., on Aug. 30, 1912.
		Purcell, armed with the latest information on energy states in nuclear particles and on microwave energy, surmised that with a strong magnetic field, he could bring the spinning nuclear particles of a specimen into alignment, then use microwaves to find their resonant frequency and magnetism.
	www.almaz.com /Nobel/physics/obit-purcell.html (837 words)

	Purcell, Edward Mills -- Encyclopædia Britannica (Site not responding. Last check: 2007-10-16)
		Purcell, E.M. American physicist who shared, with Felix Bloch of the United States, the Nobel Prize for Physics in 1952 for his independent discovery (1946) of nuclear magnetic resonance in liquids and in solids.
		Mills exerted extraordinary influence in the political arena as the longtime Democratic representative from Arkansas's Second District (1939–77) and as the chairman of the powerful House Ways and Means Committee (1957–74) before he was toppled from his lofty position by a 1974 scandal.
		Mills was born in Charleston, S.C., and studied with Thomas Jefferson.
	www.britannica.com /eb/article-9114859 (668 words)

	[No title] (Site not responding. Last check: 2007-10-16)
		Purcell shared the 1952 Nobel Prize with Felix Bloch of Stanford for their independent discovery of MRI to study magnetic fields in atomic nuclei.
		Purcell and his colleagues detected radio waves from hydrogen atoms in interstellar space.
		Purcell was known for calling the overhead projector "the greatest invention since chalk," according to the Harvard news office.
	www.s-t.com /daily/03-97/03-09-97/b05sr418.htm (176 words)

	Purcell - Wikipedia, the free encyclopedia
		Purcell, Daniel (1664-1717), English composer, younger and less significant brother to Henry
		Purcell, Joe (born 1923), former Governor of Arkansas
		In the United States, there are also places called Purcell, Missouri and Purcell, Oklahoma.
	en.wikipedia.org /wiki/Purcell (129 words)

	Purcell Oral History
		Purcell: It was assumed from the beginning that it was to be common.
		Purcell: It was because they were all physicists who trusted one another as scientists, had the same kind of values, and the same admiration for a good idea no matter who had it.
		Purcell: Again, it was a case of going after a very weak signal by means that were optimized to detect a weak signal.
	www.ieee.org /organizations/history_center/oral_histories/transcripts/purcell.html (7061 words)

	Faculty of Arts and Sciences Memorial Minute -- Edward Mills Purcell
		During the war Purcell headed the group working on very short wavelength radar at the MIT Radiation Laboratory, where microwave radar was being urgently developed to contribute decisively to the Allied victory.
		Purcell's wisdom extended beyond physics; his colleagues were enriched by his thoughtful views on subjects ranging from philosophy and education to politics and academic freedom.
		Purcell was a past president of the American Physical Society, a member of the National Academy of Sciences, a science advisor to three presidents, and recipient of numerous awards, which he accepted reluctantly.
	www.news.harvard.edu /gazette/1998/04.09/FacultyofArtsan.html (4330 words)

	Edward Mills Purcell Summary
		Purcell was not the only scientist to apply radar theory to Rabi's process: the American Felix Bloch--who had also experimented with radar during World War II--designed a method nearly identical to that of Purcell.
		Purcell was also one of the first scientists to detect the ubiquitous 21-cm radiation from neutral hydrogen in interstellar space, now used to map the distribution of hydrogen gas in galaxies and intergalactic space.
		Purcell shared the 1952 Nobel Prize in Physics for his work on the nuclear magnetic moment studies of liquid and solid helium.
	www.bookrags.com /Edward_Mills_Purcell (1057 words)

	Ewen & Purcell
		This horn antenna, now displayed in front of the Jansky Lab at NRAO in Green Bank, WV, was used by Harold Ewen and Edward Purcell, then at the Lyman Laboratory of Harvard University, in the first detection of the 21 cm emission from neutral hydrogen in the Milky Way.
		Ewen and Purcell assumed that the Dutch were probably not working on detecting the line and that the Russians might soon be.
		Purcell asked for, and received, a grant of $500 from the Rumford Fund of the American Academy of Arts and Sciences for the costs of materials for building the antenna (schematic at left), waveguide, and electronic components (schematic at right).
	www.nrao.edu /whatisra/hist_ewenpurcell.shtml (927 words)

	E. M. Purcell - Biography
		Edward Mills Purcell was born in Taylorville, Illinois, U.S.A., on August 30, 1912.
		His parents, Edward A. Purcell and Mary Elizabeth Mills, were both natives of Illinois.
		Perhaps equally influential in his subsequent scientific work was the association at this time with a number of physicists, among them I.I. Rabi, with a continuing interest in the study of molecular and nuclear properties by radio methods.
	nobelprize.org /nobel_prizes/physics/laureates/1952/purcell-bio.html (423 words)

	Edward Purcell and Nuclear Magnetic Resonance (NMR)
		Edward M. Purcell was awarded the 1952 Nobel Prize in Physics for his "development of new methods for nuclear magnetic precision measurements and discoveries in connection therewith".
		Purcell first observed nuclear magnetic resonance (NMR) in 1945 while working at the Massachusetts Institute of Technology (MIT) Radiation Laboratory in an after-hours experiment.
		Purcell "was a past president of the American Physical Society and a member of the National Academy of Sciences, American Philosophical Society and American Academy of Arts and Sciences.
	www.osti.gov /accomplishments/purcell.html (501 words)

	Purcell Family Crest
		The name Purcell is an occupational surname, a form of hereditary name that existed in both cultures long before the invaders arrived, but more common to the Anglo-Norman culture.
		The surname Purcell is derived from the Norman-French word porcel, which in turn comes from the Latin word porcus, which means pig.
		In the Purcell coat of arms as in all coat of arms the crest is only one element of the full armorial achievement.
	www.houseofnames.com /xq/asp.fc/qx/purcell-family-crest.htm (631 words)

	Mill's methods - Britannica Concise
		Mill, John Stuart - British philosopher and economist, the leading expositor of utilitarianism.
		Purcell, E.M. - American physicist who shared, with Felix Bloch of the United States, the Nobel Prize for Physics in 1952 for his independent discovery (1946) of nuclear magnetic resonance in liquids and in solids.
		Search for "Mill's methods" at Encyclopædia Britannica Online for all this plus dictionary definitions, magazine articles, and more.
	concise.britannica.com /ebc/article-9372175 (640 words)

	Purcell, E.M.
		During World War II Purcell headed a group studying radar problems at the Radiation Laboratory of the Massachusetts Institute of Technology, Cambridge.
		Such radio waves had been predicted by the Dutch astronomer H.C. van de Hulst in 1944, and their study enabled astronomers to determine the distribution and location of hydrogen clouds in galaxies and to measure the rotation of the Milky Way.
		In 1960 Purcell became Gerhard Gade professor at Harvard, and in 1980 he became professor emeritus.
	www.britanica.com /nobel/micro/487_2.html (209 words)

	Harvard Physics Cosmic Ray Shed (Site not responding. Last check: 2007-10-16)
		Robert Pound, emeritus physics professor, was working in the shed with Edward Mills Purcell in 1945 when nuclear magnetic resonance (NMR) was first observed.
		Purcell’s research with NMR earned him the Nobel Prize in 1952 (along with Felix Bloch from Stanford).
		Purcell and Pound officially came over to Harvard in July of 1946 and the new versions of NMR experiments moved to Lyman.
	www.physics.harvard.edu /shed.htm (555 words)

	Edward Mills Purcell
		With Norman F. Ramsey, he was the first to question the (now disproven) CP-symmetry of particle physics.
		Purcell is the author of Electricity and Magnetism (1963) — Volume 2 of the Berkeley Physics Course.
		This text is considered by many to be the definitive introductory electricity and magnetism text and is still in use in courses at MIT, Stanford, Chicago, and UC Berkeley among other schools.
	www.mlahanas.de /Physics/Bios/EdwardMillsPurcell.html (412 words)

	Hydrogen line - Psychology Central (Site not responding. Last check: 2007-10-16)
		He referred this to Dr Hendrik van de Hulst who, in 1944, discovered that neutral hydrogen could produce radiation at a frequency of 1420.4058 MHz due to two closely spaced energy levels in the ground state of the hydrogen atom.
		The 21cm line (1420.4058 MHz) was first observed in 1951 by Ewen and Purcell who were closely followed by Muller and Oort and Christiansen and Hindman.
		After 1952 the first maps of the neutral hydrogen in the Galaxy were made and revealed, for the first time, the spiral structure of the Milky Way.
	psychcentral.com /psypsych/Hydrogen_line (750 words)

	Nuclear magnetic resonance : NMR
		Nuclear magnetic resonance (NMR) is a physical phenomenon described independently by Felix Bloch and Edward Mills Purcell[?] in 1946 both of whom shared the Nobel Prize in physics in 1952 for their discovery.
		The development of NMR as a technique of analytical chemistry and biochemistry parallels the development of electromagnetic technology and its introduction into civilian use.
		Purcell had worked on the development and application of RADAR during World War II at MIT's Radiation Lab.
	www.fastload.org /nm/NMR.html (1638 words)

	SPACE TODAY ONLINE - Space Today Online - The Millennium - A Space and Astronomy Timeline
		Color television is introduced in U.S. American physicists Edward Mills Purcell and Harold Ewan discover electromagnetic radiation from interstellar hydrogen at a radio wavelength of 21 cm.
		Purcell and Felix Bloch independently develop the analytical technique of magnetic resonance spectroscopy for which both receive the 1952 Nobel Prize for physics.
		Apollo astronauts Virgil I. Grissom, Edward White II, and Roger B. Chaffee die in an Apollo capsule on the launch pad.
	www.spacetoday.org /History/MillenniumTimeline/20thCenturyLate.html (3099 words)

	Ewen-Purcell Horn
		Edward Mills Purcell (b.Taylorville, Ill., August 30, 1912; d.March 7, 1997) grad.
		The original paper by Van de Hulst predicting the existence of the 21 cm line expressed doubt that the line would be detectable.
		Purcell asked for, and received, a grant of $500 from the Rumford Fund of the American Academy of Arts and Sciences for the costs of materials for building the antenna, waveguide, and electronic components.
	www.gb.nrao.edu /~fghigo/fgdocs/HI21cm/ephorn.html (913 words)

	Architects Directory - ArchitectureWeek
		Edward E. Cherry and Associates - Hamden, CT, USA
		Edward Harrison Bernstein, AIA, and Associates, Architects - Philadelphia, PA, USA
		Edward I. Mills, Architects PC - New York, NY, USA
	www.architectureweek.com /directory/firms_e.html (3583 words)

	Active Skim View of: Edward Mills Purcell
		Purcell, was manager of the local telephone exchange in Taylorville, and moved, when the boy Edward was fourteen years of age, to Matoon, Illinois, some 60 miles southeast to become general manager of the Illinois Southeastern Telephone Company, an independent regional company.
		Ed constructed a simple device to provide such a transient pulse, which indeed resulted in an inverted state relative to the normal thermal polarization when the crystal was subjected to this transient and then returned to the polarizing field.
		ASTROPHYSICS AND BIOPHYSICS Although Edward Purcell's contribution to radio astronomy brought him into contact with astrophysics, it was in the early 1960s that he moved most of his creative research energies into astrophysics.
	www.nap.edu /nap-cgi/skimit.cgi?isbn=030907035X&chap=182-205 (996 words)

	Purcell Abstract
		Edward Mills Purcell served as a group leader of radar frequencies and systems research on the X-band and K-band projects, (groups 41 and 42) which involved the development of magnetrons at Radiation Lab from 1940 to 1945.
		Purcell reflects on his work on counter mortar radar and K-band experimental radar.
		He also takes the opportunity to clear Rabi's name in the controversy around K-band wavelength choice by describing how that decision was made and taking full responsibility for the problems they encountered.
	www.ieee.org /organizations/history_center/oral_histories/abstracts/purcellab.html (140 words)

	Edward Mills Purcell - Wikiquote
		Because of a change in the settings of this wiki, the "E-mail this user" function will not work anymore if you do not confirm your e-mail address
		Edward Mills Purcell was an American physicist who won the Nobel prize in 1952 for his detection of nuclear magnetic resonance.
		I have not yet lost a feeling of wonder, and of delight, that this delicate motion should reside in all the things around us, revealing itself only to him who looks for it.
	en.wikiquote.org /wiki/Edward_Mills_Purcell (156 words)

	History Channel Search Results (Site not responding. Last check: 2007-10-16)
		Purcell joined the faculty at Harvard in 1946 and taught there until his retirement in 1980.
		Although they worked independently, his work paralleled that of the Swiss-American physicist Felix Bloch, and they shared the 1952 Nobel Prize in physics for “their development of new methods for nuclear magnetic precision measurements and discoveries in connection therewith.”
		Purcell is the author of Electricity and Magnetism (1965) and numerous scientific articles.
	www.historychannel.com /thcsearch/thc_resourcedetail.do?encyc_id=220044 (185 words)

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