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Topic: Humphry Davy


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  Humphry Davy   (Site not responding. Last check: 2007-10-13)
Sir Humphry Davy (December 17, 1778 - May 29, 1829), often incorrectly spelled Humphrey, was an English chemist.
Davy became well known owing to his experiences with the physiological action of some gases, including laughing gas (nitrous oxide).
Davy used this electric battery to separate salts by what is now known as electrolysis.
bopedia.com /en/wikipedia/h/hu/humphry_davy.html   (228 words)

  
 Humphry Davy
Humphry Davy (1778–1829), son of an impoverished Cornish woodcarver, rose meteorically to become a leader in the reformed chemistry movement initiated by Antoine-Laurent Lavoisier—albeit a critic of some of its basic premises—and a pioneer in the new field of electrochemistry.
Davy's recognition that the alkalis and alkaline earths were all oxides challenged Lavoisier's theory that oxygen was the principle of acidity.
Davy became a fellow of the Royal Society in 1803 and served as its president from 1820 to 1827.
www.chemheritage.org /classroom/chemach/electrochem/davy.html   (576 words)

  
 Humphry Davy - Wikipedia, the free encyclopedia
Davy became well known due to his experiments with the physiological action of some gases, including laughing gas (nitrous oxide) - to which he was addicted, once stating that its properties bestowed all of the benefits of alcohol but was devoid of its flaws.
Davy later damaged his eyesight in a laboratory accident with nitrogen trichloride.
Davy showed it to be an element, which is now called iodine.
en.wikipedia.org /wiki/Humphry_Davy   (849 words)

  
 Sir Humphry Davy Biography (Chemist) — Infoplease.com
Humphry Davy was one of the most celebrated British chemists of the early 19th century, credited with having discovered several elements through electrolysis.
Davy got interested in chemistry as an apprentice to an apothecary when he was a young man (though he was eventually dismissed after his experiments led to explosions).
After studying chemistry, Davy got interested in the properties of gases and is famous for having sniffed nitrous oxide ("laughing gas") in 1800 and discovering its intoxicating effect (this led to a brief fad of nitrous oxide parties).
www.infoplease.com /biography/var/humphrydavy.html   (425 words)

  
 The Hindu : Humphry Davy (1778-1829): A self-educated scientist
HUMPHRY DAVY was born on December 17, 1778 in Penzance (England).
Davy's discoveries immediately led to fresh efforts to separate the new elements: in the case of sodium, by purely chemical methods within a year and later by reduction at high temperatures with carbon and iron on a large scale.
Davy did not patent the lamp which was to lead to an aerimonious claim to priority by George Stephenson (1781-1848), the inventor of steam locomotive.The miners presented him a lavish set of silver plate, which he later sold to establish a trust for awarding the Davy medal for scientific discoveries.
www.hinduonnet.com /thehindu/2000/03/23/stories/08230004.htm   (998 words)

  
 Sir Humphry Davy - LoveToKnow 1911
Soon afterwards, Count Rumford, requiring a lecturer on chemistry for the recently established Royal Institution in London, opened negotiations with him, and on the 16th of February 1801 he was engaged as assistant lecturer in chemistry and director of the laboratory.
According to his cousin, Edmund Davy,' then his laboratory assistant, he was so delighted with this achievement that he danced about the room in ecstasy.
In 1826 Davy's health, which showed signs of failure in 1823, had so declined that he could with difficulty indulge in his favourite sports of fishing and shooting, and early in 1827, after a slight attack of paralysis, he was ordered abroad.
www.1911encyclopedia.org /D/DA/DAVY_SIR_HUMPHRY.htm   (1944 words)

  
 Sir Humphry Davy
Humphry Davy was born on December 17, 1778 in Penzance, Cornwall, England.
Davy utilized the reducing power of potassium to prepare boron, and he developed the method of separating potassium from sodium based upon the insolubility of potassium perchlorate and the solubility of sodium perchlorate in 97% alcohol.
Davy twice opposed the election of Faraday to fellowship in the Royal Society.
www.corrosion-doctors.org /Biographies/DavyBio.htm   (699 words)

  
 Humphry Davy's Sexual Chemistry
Davy was represented by conservative satirists as a vain man, idolized by the women who attended his lectures, but unable to assume the male role with his own wife; in these respects he personified the stereotype dandy or fop.
Davy was also vulnerable to caricature of his clothing, gestures, and speech, which were represented either as vulgar or as pretentious attempts to transcend his lowly social origins.
Davy, the dandy of the lecture theater who so notoriously failed to establish a proper subordination of women in his own domestic life, came to be seen as a bad example to follow.
www.unh.edu /history/golinski/paper1.htm   (9073 words)

  
 Davy   (Site not responding. Last check: 2007-10-13)
Davy is best remembered for his contributions to the understanding of electrochemistry and for his invention of a safety lamp for miners.
Davy was evidently the first to observe that platinum induced the oxidation of alcohol vapor in air.
Davy's health was by then failing rapidly; in 1827 he departed for Europe and, in the summer, was forced to resign the presidency of the Royal Society, being succeeded by Davies Gilbert.
chem.ch.huji.ac.il /~eugeniik/history/davy.htm   (3282 words)

  
 Davy, Humphry (1778-1829) -- from Eric Weisstein's World of Scientific Biography
In fact, it was as an assistant in Davy's lab that Faraday began his scientific career.
One of Davy's experiments consisted of rubbing two ice cubes together and observing that they melted, in contradiction to the caloric theory.
Davy also proposed a system of proportions to calculate ratios of chemical combination similar to the "chemical equivalents" of Wollaston.
scienceworld.wolfram.com /biography/Davy.html   (190 words)

  
 Sir Humphry Davy - Cornish History - The Magic of Cornwall
Humphey Davy was born in Penzance on 17th December 1778, the son of a woodcarver.
Davy concluded that the production of electricity in simple electrolytic cells was the result of a chemical reaction, and that because of this reaction it offered the best means of decomposing all substances to their elements.
Davy did not patent his invention, he wrote that "...my sole object was to serve the cause of humanity and if I have succeeded I am rewarded in the gratifying of having done so".
www.themagicofcornwall.com /Pages/history/davy.htm   (1127 words)

  
 Humphry Davy, Sir Biography | Encyclopedia of World Biography
The English chemist and natural philosopher Sir Humphry Davy (1778-1829) isolated and named the elements of the alkaline-earth and alkali metals and showed that chlorine and iodine were elements.
Humphry Davy was born on Dec. 17, 1778, in Penzance, Cornwall.
Davy doubted the validity of this claim and in 1810 showed that "oxymuriatic acid gas" was not the oxide of an unknown element, murium, but a true element, which he named chlorine.
www.bookrags.com /biography/humphry-davy-sir   (633 words)

  
 Sir Humphry Davy   (Site not responding. Last check: 2007-10-13)
Humphry Davy is most associated in many minds with the invention of the miners' safety lamp.
Humphry Davy was born in Penzance in December 1778.
Soon after Davy's death Dr Henry wrote in his preface to "Elements of Chemistry": "Davy was a master of the practice of the inductive logic; and he has left us some of the noblest examples of the efficacy of that great instrument of human reason in the discovery of math.
dspace.dial.pipex.com /town/pipexdsl/q/aquq77/swehs/docs/news14su.html   (1205 words)

  
 Davy, Sir Humphry - HighBeam Encyclopedia   (Site not responding. Last check: 2007-10-13)
DAVY, SIR HUMPHRY [Davy, Sir Humphry] 1778-1829, English chemist and physicist.
The son of a woodcarver, he received his early education at Truro and was apprenticed (1795) to a surgeon-apothecary at Penzance.
Humphry Davy and the murder lamp: Max Adams investigates the truth behind the introduction of a key invention of the early Industrial Revolution.(FRONTLINE)
www.encyclopedia.com /doc/1E1-davy-sir.html   (291 words)

  
 Humphry Davy Biography | scit_0512345_package.xml
Humphry Davy is most famous for his discoveries of potassium, sodium, chlorine, and other elements using powerful voltaic batteries.
Davy was born to a family of modest means in the remote coastal town of Penzance in Cornwall, England.
The young Davy's chemical research so impressed a few local scientists that in 1798 at age 19 he was recommended for a position at Dr. Thomas Beddoes's Pneumatic Institution in Bristol, an institution dedicated to researching the medical uses of gases.
www.bookrags.com /biography/humphry-davy-scit-0512345   (790 words)

  
 §23. Sir Humphry Davy; Electricity and Chemical Affinity. VIII. The Literature of Science. Vol. 14. The Victorian ...
Humphry Davy was the most brilliant of English chemists.
Davy sent an electric current through pieces of potash and soda; the solids melted, and “small globules, having a high metallic lustre, and being precisely similar in visible characters to quicksilver, appeared.” By burning the metal-like globules, Davy obtained potash and soda.
By putting away, for the time, all hypotheses and speculations, and by conducting his experiments quantitatively, Davy showed that oxymuriatic acid is not an acid, but is a simple substance, that is, a substance which is not decomposed in any of the changes it undergoes.
www.bartleby.com /224/0823.html   (678 words)

  
 Davy   (Site not responding. Last check: 2007-10-13)
Humphry Davy (1778-1829) was 19 when he began studying chemistry after reading Antoine Lavoisier's Traité Elémentaire published eight years earlier.
Since nitric oxide and carbon monoxide were among the gases studied, it is surprising he survived to write at length on the physiological and psychological effects of nitrous oxide (laughing gas).
Since Davy later isolated crude boron and silicon, he had a hand in the discovery of almost 10 percent of the elements in the periodic table.
www.bioanalytical.com /info/calendar/97/davy.htm   (235 words)

  
 SJSU Virtual Museum   (Site not responding. Last check: 2007-10-13)
During his career, Davy isolated the elements of potassium, calcium, and sodium by electrolysis (passing an electrical current through a solution).
Davy demonstrated that the "rare earth elements" are really metal oxides rather than pure substances.
During his career, Davy was awarded the Napoleon Prize by the Institut de France, the gold and silver Rumford medals of the Royal Society, a baronetcy, and Presidency of the Royal Society.
www.sjsu.edu /depts/Museum/dav.html   (242 words)

  
 Humphry Davy
This led to Davy being appointed as a lecturer at the Royal Institution.
Davy was now considered to be Britain's leading scientist and in 1812 was knighted by George III.
In 1815 Humphry Davy invented a safety lamp for use in gassy coalmines, allowing deep coal seams to be mined despite the presence of firedamp (methane).
www.spartacus.schoolnet.co.uk /SCdavy.htm   (578 words)

  
 DAVY, HUMPHRY (1778 - 1829)   (Site not responding. Last check: 2007-10-13)
Davy proceeded to try other gases, including nitric oxide and carbon monoxide; he later warned his brother against perilous experiments of this kind.
In 1800 Davy had concluded that oxygen and hydrogen, in the theoretical proportions, were the only products of the electrolysis of pure water, and in 1807 Davy described the discovery of potassium by electrolysis of slightly damp fused potash.
Davy danced about the room in ecstatic delight; he likened the potassium to substances imagined by alchemical visionaries.
www.scs.uiuc.edu /~mainzv/exhibit/davy.htm   (243 words)

  
 Humphry Davy
Sir Humphry Davy, English chemist, was born on the 17th of December 1778 at or near Penzance in Cornwall.
Beginning with metaphysics and ethics and passing on to mathematics, he turned to chemistry at the end of 1797, and within a few months of reading Nicholson's and Lavoisier's treatises on that science had produced a new theory of light and heat.
In 1826 Davy's health, which showed signs of failure in 1823, had so declined that he could with difficulty indulge in his favorite sports of fishing and shooting, and early in 1827, after a slight attack of paralysis, he was ordered abroad.
www.nndb.com /people/028/000083776   (1980 words)

  
 Davy on Chlorine
It sometimes explodes during the time of its transfer from one vessel to another, producing heat and light, with an expansion of volume; and it may be always made to explode by a very gentle heat, often by that of the hand.*
Davy, from whom I receive constant and able assistance in all my chemical enquiries, has several times observed explosions, in transferring the gas from hyperoxymuriate of potash, over mercury, and he was inclined to attribute the phaenomenon to th combustion of a thin film of mercury, in contact with a globule of gas.
I several times endeavoured toproduce the effect, but withut success, till an acid was employed for the preparation of the gas, so diluted as not to afford it without the assistance of heat.
dbhs.wvusd.k12.ca.us /webdocs/Chem-History/Davy-Chlorine-1811.html   (1970 words)

  
 Sir Humphry Davy   (Site not responding. Last check: 2007-10-13)
Although Davy's most significant achievements were scientific -- he discovered the elements potassium, sodium, barium, strontium, calcium, and magnesium; invented the safety lamp; and published important work on nitrous oxide (laughing gas), respiration, agriculture, and electromagnetism -- his interests ranged even more widely.
William Godwin knew Davy well, and in the early 1800s the scientist was a frequent guest at his home.
How well Mary in her childhood would have understood Davy's prominence is not known, but as a family name his scientific advances could not but attract her later attention.
www.english.upenn.edu /Projects/knarf/Davy/davy.html   (310 words)

  
 Sir Humphry Davy
Davy, educated in Penzance and Truro in Cornwall, was apprenticed to a surgeon in 1795.
Although he overestimated the ability of electrolysis, he did successfully isolate sodium and potassium, and was the first to discover boron, hydrogen telluride, and hydrogen phosphide (phosphine).
Faraday traveled with Davy and his wife through Europe, including France, for which he received particular permission from Napoleon himself.
www.english.upenn.edu /Projects/knarf/Davy/bio.html   (542 words)

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