Wednesday, March 25, 2020
Michael Faraday Essays - Fellows Of The Royal Society,
Michael Faraday It is not my intention to lay before you a life of Faraday in the ordinary accepting of the term. The duty I have to perform is to give you some notion of what he has done in the world; dwelling incidentally on the spirit in which his work was executed, and introducing such personal traits as may be necessary to the completion of your picture of the philosopher, though by no means adequate to give you a complete idea of the man. Michael Faraday was born at Newington Butts, on September 22, 1791, and he died at Hampton Court, on August 25, 1867. When thirteen years old, that is to say in 1804, Faraday was apprenticed to a bookseller and bookbinder where he spent eight years of his life, after which he worked as a journeyman elsewhere. Faraday's first contact with the Royal Institution was that he was introduced by one of the members to Sir Humphry Davy's last lectures, that he took notes of those lectures; wrote them fairly out, and sent them to Davy, entreating him at the same time to enable him to quit trade, and to pursue science, which he loved. Davy was helpful to Faraday, and this should never be forgotten. He at once wrote to Faraday, and afterwards, when an opportunity occurred, made him his assistant. In Rome he made rapid progress in chemistry, and after a time was entrusted with easy analyses by Davy. In those days the Royal Institution published 'The Quarterly Journal of Science,' the precursor of 'Proceedings.' Faraday's first contribution to science appeared in that journal in 1816. It was an analysis of some caustic lime from Tuscany, which had been sent to Davy by the Duchess of Montrose. Between this period and 1818 various notes and short papers were published by Faraday. In 1818 he experimented upon 'Sounding Flames.' From time to time between 1818 and 1820 Faraday published scientific notes and notices of minor weight. At this time he was acquiring, not producing; working hard for his master and storing and strengthening his own mind. He assisted Mr. Brande in his lectures, and so quietly, skillfully, and modestly was his work done, that Mr. Brande's vocation at the time was pronounced 'lecturing on velvet.' In 1820 Faraday published a chemical paper 'on two new compounds of chlorine and carbon, and on a new compound of iodine, carbon, and hydrogen.' This paper was read before the Royal Society on December 21, 1820, and it was the first of his that was honored with a place in the 'Philosophical Transactions.' On June 12, 1821, he married, and obtained leave to bring his young wife into his rooms at the Royal Institution. There for forty-six years they lived together, occupying the suite of apartments which had been previously in the successive occupancy of Young, Davy, and Brande. At the time of her marriage Mrs. Faraday was twenty-one years of age, he being nearly thirty. Oersted, in 1820, discovered the action of a voltaic current on a magnetic needle; and immediately afterwards the splendid intellect of Ampere succeeded in showing that every magnetic phenomenon then known might be reduced to the mutual action of electric currents. This attracted Faraday's attention to the subject. He read much about it; and in the months of July, August, and September he wrote a 'history of the progress of electromagnetism,' which he published in Thomson's 'Annals of Philosophy.' Soon afterwards he took up the subject of 'Magnetic Rotations,' and on the morning of Christmas-day, 1821, he called his wife to witness, for the first time, the revolution of a magnetic needle round an electric current. Incidental to the 'historic sketch,' he repeated almost all the experiments there referred to; and these, added to his own subsequent work, made him practical master of all that was then known regarding the voltaic current. In 1821, he also touched upon a subject which subs equently received his closer attention--the vaporization of mercury at common temperatures; and immediately afterwards conducted experiments on the alloys of steel. He was accustomed in after years to present to his friends razors formed from one of the alloys then discovered. During Faraday's hours of liberty from other
Friday, March 6, 2020
Greek Alphabet Essay Example
Greek Alphabet Essay Example Greek Alphabet Paper Greek Alphabet Paper From Wikipedia, the free encyclopedia Jump to: navigation, search This article contains special characters. Without proper rendering support, you may see question marks, boxes, or other symbols. Greek alphabet Type Alphabet Spoken languages Greek, with many modifications covering many languages Time period ~800 BC to the present[1] Parent systems Proto-Sinaitic alphabet Phoenician alphabet Greek alphabet Child systems Gothic Glagolitic Cyrillic Coptic Armenian alphabet Old Italic alphabet Latin alphabet Unicode range U+0370ââ¬âU+03FF Greek and Coptic, U+1F00ââ¬âU+1FFF Greek Extended ISO 15924 Grek Note: This page may contain IPA phonetic symbols. Greek alphabet Alpha Nu Beta Xi Gamma Omicron Delta Pi Epsilon Rho Zeta Sigma Eta Tau Theta Upsilon Iota Phi Kappa Chi Lambda Psi Mu Omega Other characters Digamma Stigma Heta San Qoppa Sampi Greek diacritics Greek Alphabet. (Listen to the Greek alphabet) Problems listening to this file? See media help. Dipylon inscription, one of the oldest known samples of the use of the Greek alphabet, ca. 740 BCThe Greek alphabet is a set of twenty-four letters that has been used to write the Greek language since the 8th century BC. [2] It is still in use today. It is the first and oldest alphabet in the narrow sense that it notes each vowel and consonant with a separate symbol. [3] The letters were also used to represent Greek numerals, beginning in the 2nd century BC. : The Greek alphabet is descended from the Phoenician alphabet, and is not related to Linear B or the Cypriot syllabary, earlier writing systems for Greek. It has given rise to many other alphabets used in Europe and the Middle East, including the Latin alphabet. [3] In addition to being used for writing Ancient and Modern Greek, its letters are today used as symbols in mathematics and science, as particle names in physics, as components of star names, in the names of fraternities and sororities, in the naming of supernumerary tropical cyclones, and for other purposes.
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