{"title":"Science - Physics - Magnetism","description":"","products":[{"product_id":"contributions-from-the-museum-of-history-and-technology-paper-8-gb-31999","title":"Contributions from the Museum of History and Technology, Paper 8","description":"\u003cp\u003e\u003cb\u003eThe Natural Philosophy of William Gilbert and His Predecessors\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003eUntil several decades ago, the physical sciences were\r\nconsidered to have had their origins in the 17th centurymechanics\r\nbeginning with men like Galileo Galilei and\r\nmagnetism with men like the Elizabethan physician and\r\nscientist William Gilbert.\r\n\r\nHistorians of science, however, have traced many of the\r\n17th century's concepts of mechanics back into the Middle\r\nAges. Here, Gilbert's explanation of the loadstone and\r\nits powers is compared with explanations to be found in\r\nthe Middle Ages and earlier.\r\n\r\nFrom this comparison it appears that Gilbert can best\r\nbe understood by considering him not so much a herald\r\nof the new science as a modifier of the old.\nThe Author: W. James King is curator of electricity,\r\nMuseum of History and Technology, in the Smithsonian\r\nInstitution's United States National Museum.\nThe year 1600 saw the publication by an English\r\nphysician, William Gilbert, of a book on the\r\nloadstone. Entitled De magnete,[1] it has traditionally\r\nbeen credited with laying a foundation for the\r\nmodern science of electricity and magnetism. The\r\nfollowing essay is an attempt to examine the basis\r\nfor such a tradition by determining what Gilbert's\r\noriginal contributions to these sciences were, and\r\nto make explicit the sense in which he may be considered\r\nas being dependent upon earlier work. In\r\nthis manner a more accurate estimate of his position\r\nin the history of science may be made.\n\u003cb\u003e ......Buy Now (To Read More)\u003c\/b\u003e\u003c\/p\u003e\u003ch3\u003eProduct details\u003ch3\u003e\u003c\/h3\u003e\n\u003c\/h3\u003e\u003cp\u003e\u003cb\u003eEbook Number\u003c\/b\u003e: 31999 \u003cbr\u003e\u003cb\u003eAuthor\u003c\/b\u003e: King, W. James (William James) \u003cbr\u003e\u003cb\u003eRelease Date\u003c\/b\u003e: Apr 15, 2010 \u003cbr\u003e\u003cb\u003eFormat\u003c\/b\u003e: eBook \u003cbr\u003e\u003cb\u003eLanguage\u003c\/b\u003e: English \u003cbr\u003e\u003c\/p\u003e","brand":"booksdeli.com","offers":[{"title":"King, W. James (William James),1915- \/ eBook \/ English","offer_id":43219733577885,"sku":"gb-31999-ebook","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0619\/5648\/9373\/products\/31999.jpg?v=1671532303"},{"product_id":"on-the-magnet-magnetick-bodies-also-and-on-the-great-magnet-the-earth-gb-33810","title":"On the magnet, magnetick bodies also, and on the great magnet the earth","description":"\u003cp\u003e\u003cb\u003eOn the magnet, magnetick bodies also, and on the great magnet the earth - a new physiology, demonstrated by many arguments \u0026amp; experiments\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003elearer proofs, in the discovery of\r\n  secrets, and in the investigation of the hidden causes of things, being\r\n  afforded by trustworthy experiments and by demonstrated arguments, than\r\n  by the probable guesses and opinions of the ordinary professors of\r\n  philosophy: so, therefore, that the noble substance of that great magnet,\r\n  our common mother (the earth), hitherto quite unknown, and the\r\n  conspicuous and exalted powers of this our globe, may be the better\r\n  understood, we have proposed to begin with the common magnetick, stony,\r\n  and iron material, and with magnetical bodies, and with the nearer parts\r\n  of the earth which we can reach with our hands and perceive with our\r\n  senses; then to proceed with demonstrable magnetick experiments; and so\r\n  penetrate, for the first time, into the innermost parts of the earth. For\r\n  after we had, in order finally to learn the true substance of the globe,\r\n  seen and thoroughly examined many of those things which have been\r\n  obtained from mountain heights or ocean depths, or from the profoundest\r\n  caverns and from hidden mines: we applied much prolonged labour on\r\n  investigating the magnetical forces; so wonderful indeed are they,\r\n  compared with the forces of all other minerals, surpassing even the\r\n  virtues of all other bodies about us. Nor have we found this our labour\r\n  idle or unfruitful; since daily during our experimenting, new and\r\n  unexpected properties came to light; and our Philosophy hath grown so\r\n  much from the things diligently observed, that we have attempted to\r\n  expound the interior parts of the terrene globe, and its native\r\n  substance, upon magnetick principles; and to reveal to men the earth (our\r\n  common mother), and to point it out as if with the finger, by real\r\n  demonstrations and by experiments manifestly apparent to the senses. And\r\n  as geometry ascends from sundry very small and very easy principles to\r\n  the greatest and most difficult; by which the wit of man climbs above the\r\n  firmament: so our magnetical doctrine and science first sets forth in\r\n  convenient order the things which are less obscure; from these there come\r\n  to light others that are more remarkable; and at length in due order\r\n  there are opened the concealed and most secret things of the globe of the\r\n  earth, and the causes are made known of those things which, either\r\n  through the ignorance of the ancients or the neglect of moderns, have\r\n  remained unrecognized and overlooked. But why should I, in so vast an\r\n  Ocean of Books by which the minds of studious men are troubled and\r\n  fatigued, through which very foolish productions the world and\r\n  unreasoning men are intoxicated, and puffed up, rave and create literary\r\n  broils, and while professing to be philosophers, physicians,\r\n  mathematicians and astrologers, neglect and despise men of learning: why\r\n  should I, I say, add aught further to this so-perturbed republick of\r\n  letters, and expose this noble philosophy, which seems new and incredible\r\n  by reason of so many things hitherto unrevealed, to be damned and torn to\r\n  pieces by the maledictions of those who are either already sworn to the\r\n  opinions of other men, or are foolish corruptors of good arts, learned\r\n  idiots, grammatists, sophists, wranglers, and perverse little folk? But\r\n  to you alone, true philosophizers, honest men, who seek knowledge not\r\n  from books only but from things themselves, have I addressed these\r\n  magnetical principles in this new sort of Philosophizing. But if any see\r\n  not fit to assent to these self-same opinions and paradoxes, let them\r\n  nevertheless mark the great array of experiments and discoveries (by\r\n  which notably every philosophy flourisheth), which have been wrought out\r\n  and demonstrated by us with many pains and vigils and expenses. In these\r\n  rejoice, and employ them to better uses, if ye shall be able. I know how\r\n  arduous it is to give freshness to old things, lustre to the antiquated,\r\n  light to the dark, grace to the despised, credibility to the doubtful; so\r\n  much the more by far is it difficult to win and establish some authority\r\n  for things new and unheard-of, in the face of all the opinions of all\r\n  men. Nor for that do we care, since philosophizing, as we deemed, is for\r\n  the few. To our own discoveries and experiments we have affixed\r\n  asterisks, larger and smaller, according to the importance and subtlety\r\n  of the matter. Whoso desireth to make trial of the same experiments, let\r\n  him handle the substances, not negligently and carelessly, but prudently,\r\n  deftly, and in the proper way; nor let him (when a thing doth not\r\n  succeed) ignorantly denounce our discoveries: for nothing hath been set\r\n  down in these books which hath not been explored and many times performed\r\n  and repeated amongst us. Many things in our reasonings and hypotheses\r\n  will, perchance, at first sight, seem rather hard, when they are foreign\r\n  to the {iij}commonly received opinion; yet I doubt not\r\n  but that hereafter they will yet obtain authority from the demonstrations\r\n  themselves. Wherefore in magnetical science, they who have made most\r\n  progress, trust most in and profit most by the hypotheses; nor will\r\n  anything readily become certain to any one in a magnetical philosophy in\r\n  which all or at least most points are not ascertained. This\r\n  nature-knowledge is almost entirely new and unheard-of, save what few\r\n  matters a very few writers have handed down concerning certain common\r\n  magnetical powers. Wherefore we but seldom quote antient Greek authors in\r\n  our support, because neither by using greek arguments nor greek words can\r\n  the truth be demonstrated or elucidated either more precisely or more\r\n  significantly. For our doctrine magnetical is at variance with most of\r\n  their principles and dogmas. Nor have we brought to this work any\r\n  pretence of eloquence or adornments of words; but this only have we done,\r\n  that things difficult and unknown might be so handled by us, in such a\r\n  form of speech, and in such words as are needed to be clearly understood:\r\n  Sometimes therefore we use new and unusual words, not that by means of\r\n  foolish veils of vocabularies we should cover over the facts with shades\r\n  and mists (as Alchemists are wont to do) but that hidden things which\r\n  have no name, never having been hitherto perceived, may be plainly and\r\n  correctly enunciated. After describing our magnetical experiments and our\r\n  information of the homogenick parts of the earth, we proceed to the\r\n  general nature of the whole globe; wherein it is permitted us to\r\n  philosophize freely and with the same liberty which the Egyptians,\r\n  Greeks, and Latins formerly used in publishing their dogmas: whereof very\r\n  many errors have been handed down in turn to later authors: and in which\r\n  smatterers still persist, and wander as though in perpetual darkness. To\r\n  those early forefathers of philosophy, Aristotle, Theophrastus, Ptolemy,\r\n  Hippocrates, and Galen, let due honour be ever paid: for by them wisdom\r\n  hath been diffused to posterity; but our age hath detected and brought to\r\n  light very many facts which they, were they now alive, would gladly have\r\n  accepted. Wherefore we also have not hesitated to expound in demonstrable\r\n  hypotheses those things which we have discovered by long experience.\r\n  Farewell.\n\u003cb\u003e ......Buy Now (To Read More)\u003c\/b\u003e\u003c\/p\u003e\u003ch3\u003eProduct details\u003ch3\u003e\u003c\/h3\u003e\n\u003c\/h3\u003e\u003cp\u003e\u003cb\u003eEbook Number\u003c\/b\u003e: 33810 \u003cbr\u003e\u003cb\u003eAuthor\u003c\/b\u003e: Gilbert, William \u003cbr\u003e\u003cb\u003eRelease Date\u003c\/b\u003e: Sep 26, 2010 \u003cbr\u003e\u003cb\u003eFormat\u003c\/b\u003e: eBook \u003cbr\u003e\u003cb\u003eLanguage\u003c\/b\u003e: English \u003cbr\u003e\u003c\/p\u003e\u003ch3\u003eContributors\u003ch3\u003e\u003c\/h3\u003e\n\u003c\/h3\u003e\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eTranslator\u003c\/b\u003e: Thompson, Silvanus P. (Silvanus Phillips), 1851-1916 \u003cbr\u003e\u003c\/p\u003e","brand":"booksdeli.com","offers":[{"title":"Gilbert, William,1544-1603 \/ eBook \/ English","offer_id":43219965477021,"sku":"gb-33810-ebook","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0619\/5648\/9373\/products\/33810.jpg?v=1671539049"},{"product_id":"electricity-and-magnetism-gb-34221","title":"Electricity and Magnetism","description":"\u003cp\u003e\u003cb\u003eElectricity and Magnetism\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003eFor the benefit of the readers of Vol. III,\r\nwho have not read the general Introduction\r\nfound in Vol. I, a word as to the scope and\r\nobject of this volume will not be amiss.\nIt will be plain to any one on seeing the size\r\nof the little book that it cannot be an exhaustive\r\ntreatise on a subject so large as\r\nthat of Electricity. This volume, like the\r\nothers, is intended for popular reading, and\r\ntechnical terms are avoided as far as possible,\r\nor when used clearly explained. The subject\r\nis treated historically, theoretically, and practically.\nAs the author has lived through the period\r\nduring which the science of Electricity has\r\nhad most of its growth, he naturally and\r\nnecessarily deals somewhat in reminiscence.\r\nAll he hopes to do is to plant a few seed-thoughts\r\nin the minds of his readers that will\r\nawaken an interest in the study of natural\r\nscience; and especially in its most fascinating\r\nbranchElectricity.[Pg vi]\nIf Vol. I is at hand, please read the Introduction.\r\nIt will bring you into closer sympathy\r\nwith the author and his mode of treatment.\n\u003cb\u003e ......Buy Now (To Read More)\u003c\/b\u003e\u003c\/p\u003e\u003ch3\u003eProduct details\u003ch3\u003e\u003c\/h3\u003e\n\u003c\/h3\u003e\u003cp\u003e\u003cb\u003eEbook Number\u003c\/b\u003e: 34221 \u003cbr\u003e\u003cb\u003eAuthor\u003c\/b\u003e: Gray, Elisha \u003cbr\u003e\u003cb\u003eRelease Date\u003c\/b\u003e: Nov 6, 2010 \u003cbr\u003e\u003cb\u003eFormat\u003c\/b\u003e: eBook \u003cbr\u003e\u003cb\u003eLanguage\u003c\/b\u003e: English \u003cbr\u003e\u003c\/p\u003e","brand":"booksdeli.com","offers":[{"title":"Gray, Elisha,1835-1901 \/ eBook \/ English","offer_id":43220019773597,"sku":"gb-34221-ebook","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0619\/5648\/9373\/products\/34221.jpg?v=1671540468"},{"product_id":"william-gilbert-and-terrestial-magnetism-in-the-time-of-queen-elizabeth-gb-45893","title":"William Gilbert, and Terrestial Magnetism in the Time of Queen Elizabeth","description":"\u003cp\u003e\u003cb\u003eWilliam Gilbert, and Terrestial Magnetism in the Time of Queen Elizabeth - A Discourse\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003eWilliam Gilbert, the\r\nfather of electrical science,\r\nwas born in Colchester in\r\n1540. Educated at St. John's\r\nCollege, Cambridge, where\r\nhe took his degree as Doctor\r\nof Medicine in 1569, he settled, after four years of\r\nforeign travel, in London in 1573, and was admitted\r\nto the Royal College of Physicians, of which\r\nhe became Censor, Treasurer, and, in 1599, President.\r\nHe was in February, 1601, appointed personal\r\nPhysician to the Queen, whom he attended2\r\nin her last illness. He came of a well-known East\r\nAnglian family, and held extensive landed estates\r\nin Essex and Suffolk. He survived the Queen only\r\neight months, dying November 30th, 1603.\nGilbert's monumental work, the\r\nDe Magnete, published in 1600,\r\nmarks an era in magnetic science.\r\nFor some four hundred years the\r\nemployment of the magnetic needle\r\nin navigation had been known\r\nboth in Northern and Southern Europe. While it\r\nis possible that the primitive use of the loadstone\r\nmay be ascribed to the Baltic, it is certain that the\r\nemployment of a pivotted needle, and the addition\r\nof a rose of the winds as a compass card both originated\r\nin the Mediterranean. The pivotted needle\r\nis described in the Epistle of Peter Peregrinus, written\r\nin 1269; while the earliest known compass-card\r\nmarked with the initials of the names of the winds\r\nis that ascribed to Jachobus Giraldis, of 1426, in the\r\nBiblioteca Marciana in Venice. The manner of\r\nuse in Elizabethan times of the loadstone and of the\r\ncompass may be gathered from Olaus Magnus\r\n(Historia de Gentibus Septentrionalibus, 1555), from\r\nPedro de Medina (Arte de Nauegar, 1545), Martinus3\r\nCortes (Breve compendio de la sphera, 1556),\r\nBlundevile (Exercises, 1594), Norman (Newe Attractive,\r\n1581), Borough (A discours of the Variation\r\nof the Cumpas, 1581), Pedro Nuez (Instrumenta\r\nArtis Navigandi, 1592), Barlow (The Navigators\r\nSupply, 1597), Nautonier (Mcometrie de l'Eyman,\r\n1602), and Stevin (Die Havenvinding, 1599).\n\u003cb\u003e ......Buy Now (To Read More)\u003c\/b\u003e\u003c\/p\u003e\u003ch3\u003eProduct details\u003ch3\u003e\u003c\/h3\u003e\n\u003c\/h3\u003e\u003cp\u003e\u003cb\u003eEbook Number\u003c\/b\u003e: 45893 \u003cbr\u003e\u003cb\u003eAuthor\u003c\/b\u003e: Thompson, Silvanus P. (Silvanus Phillips) \u003cbr\u003e\u003cb\u003eRelease Date\u003c\/b\u003e: Jun 5, 2014 \u003cbr\u003e\u003cb\u003eFormat\u003c\/b\u003e: eBook \u003cbr\u003e\u003cb\u003eLanguage\u003c\/b\u003e: English \u003cbr\u003e\u003c\/p\u003e","brand":"booksdeli.com","offers":[{"title":"Thompson, Silvanus P. (Silvanus Phillips),1851-1916 \/ eBook \/ English","offer_id":43221610823837,"sku":"gb-45893-ebook","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0619\/5648\/9373\/products\/45893.jpg?v=1671607801"},{"product_id":"the-study-of-elementary-electricity-and-magnetism-by-experiment-gb-48041","title":"The Study of Elementary Electricity and Magnetism by Experiment","description":"\u003cp\u003e\u003cb\u003eThe Study of Elementary Electricity and Magnetism by Experiment\r - Containing Two Hundred Experiments Performed with Simple, Home-made Apparatus\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003eTHE STUDY OF ELEMENTARY ELECTRICITY AND\r\nMAGNETISM BY EXPERIMENT. This book is designed\r\nas a text-book for amateurs, students, and others who wish to\r\ntake up a systematic course of simple experiments at home or in\r\nschool.\n\nTHINGS A BOY SHOULD KNOW ABOUT ELECTRICITY.\r\nThis book explains, in simple, straightforward\r\nlanguage, many things about electricity; things in which the\r\nAmerican boy is intensely interested; things he wants to know;\r\nthings he should know.\r\n\nThe student is advised to begin at the beginning, to\r\nperform the experiments in the order given, and to understand\r\neach step before proceeding. Certain principles\r\nand explanations necessarily precede the practical and\r\nperhaps more interesting applications of those principles.\nFor the benefit of those who wish to make their own\r\napparatus, the author has given, throughout the work,\r\nexplanations that will aid in the construction of certain\r\npieces especially adapted to these experiments. For\r\nthose who have the author's \"How Two Boys Made\r\nTheir Own Electrical Apparatus,\" constant references\r\nhave been made to it as the \"Apparatus Book,\" as this\r\ncontains full details for making almost all kinds of simple\r\napparatus needed in \"The Study of Elementary Electricity\r\nand Magnetism by Experiment.\"\n\u003cb\u003e ......Buy Now (To Read More)\u003c\/b\u003e\u003c\/p\u003e\u003ch3\u003eProduct details\u003ch3\u003e\u003c\/h3\u003e\n\u003c\/h3\u003e\u003cp\u003e\u003cb\u003eEbook Number\u003c\/b\u003e: 48041 \u003cbr\u003e\u003cb\u003eAuthor\u003c\/b\u003e: St. John, Thomas M. (Thomas Matthew) \u003cbr\u003e\u003cb\u003eRelease Date\u003c\/b\u003e: Jan 22, 2015 \u003cbr\u003e\u003cb\u003eFormat\u003c\/b\u003e: eBook \u003cbr\u003e\u003cb\u003eLanguage\u003c\/b\u003e: English \u003cbr\u003e\u003c\/p\u003e","brand":"booksdeli.com","offers":[{"title":"St. John, Thomas M. (Thomas Matthew),1865- \/ eBook \/ English","offer_id":43221778530461,"sku":"gb-48041-ebook","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0619\/5648\/9373\/products\/48041.jpg?v=1671615742"},{"product_id":"discorso-sopra-la-calamita-gb-48352","title":"Discorso sopra la calamita","description":"\u003cp\u003e\u003cb\u003eDiscorso sopra la calamita\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e\r\nSOCIO ORDINARIO DELLA ACCADEMIA PONTIFICIA DE' NUOVI LINCEI\r\nSOCIO CORRISPONDENTE DELL'ACCADEMIA DELLE SCIENZE\r\nDELL'ISTITUTO DI BOLOGNA\r\nDELLE R. ACCADEMIE DELLE SCIENZE DI TORINO,\r\nE DI SCIENZE, LETTERE ED ARTI DI MODENA\r\nE SOCIO ONORARIO DELLA R. ACCADEMIA DELLE SCIENZE DI BERLINO\r\n\n\r\nFra i molti tesori di cose edite ed inedite che si conservano nella preziosa\r\ncollezione dei Manoscritti Galileiani presso la Biblioteca Nazionale di Firenze,\r\ne precisamente nella divisione quarta di tale collezione, dedicata ai Discepoli\r\ndi Galileo,  contenuto un Discorso sopra la calamita, scritto dal P.\r\nD. Benedetto Castelli[1], ed indirizzato sotto forma di lettera a Monsignore\r\nDon Ferdinando Cesarini, prelato Romano e referendario dell'una e l'altra\r\nsegnatura[2].\r\n\n\r\nDi questo Discorso non  a noi noto se non l'esemplare test menzionato,\r\nil quale occupa le carte 191 recto usque 206 verso del Tomo I[3] della anzidetta\r\ndivisione. Esso  scritto di mano ignota, con caratteri verosimilmente\r\nappartenenti alla fine del decimosettimo secolo e non contiene alcuna indicazione,\r\ndalla quale risulti con tutta precisione il tempo nel quale la presente\r\nscrittura  stata stesa. Nulla affatto poi  a questo proposito contenuto\r\nnell'indice premesso al volume che la contiene, nel quale si legge soltanto:\r\n\n\u003cb\u003e ......Buy Now (To Read More)\u003c\/b\u003e\u003c\/p\u003e\u003ch3\u003eProduct details\u003ch3\u003e\u003c\/h3\u003e\n\u003c\/h3\u003e\u003cp\u003e\u003cb\u003eEbook Number\u003c\/b\u003e: 48352 \u003cbr\u003e\u003cb\u003eAuthor\u003c\/b\u003e: Castelli, Benedetto \u003cbr\u003e\u003cb\u003eRelease Date\u003c\/b\u003e: Feb 24, 2015 \u003cbr\u003e\u003cb\u003eFormat\u003c\/b\u003e: eBook \u003cbr\u003e\u003cb\u003eLanguage\u003c\/b\u003e: Italian \u003cbr\u003e\u003c\/p\u003e\u003ch3\u003eContributors\u003ch3\u003e\u003c\/h3\u003e\n\u003c\/h3\u003e\u003cp\u003e\u003cb\u003eEditor\u003c\/b\u003e: Favaro, Antonio, 1847-1922 \u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"booksdeli.com","offers":[{"title":"Castelli, Benedetto,1578?-1643 \/ eBook \/ Italian","offer_id":43221799895197,"sku":"gb-48352-ebook","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0619\/5648\/9373\/products\/48352.jpg?v=1671616929"},{"product_id":"the-letter-of-petrus-peregrinus-on-the-magnet-a-d-1269-gb-50524","title":"The Letter of Petrus Peregrinus on the Magnet, A.D. 1269","description":"\u003cp\u003e\u003cb\u003eThe Letter of Petrus Peregrinus on the Magnet, A.D. 1269\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003eThe magnetic lore of classic antiquity was\r\nscanty indeed, being limited to the attraction\r\nwhich the lodestone manifests\r\nfor iron. Lucretius (99-55 B. C.), however, in\r\nhis poetical dissertation on the magnet, contained\r\nin De Rerum Natura, Book VI.[1] recognizes magnetic\r\nrepulsion, magnetic induction, and to some\r\nextent the magnetic field with its lines of force,\r\nfor in verse 1040 he writes:\nThe poet Claudian (365-408 A. D.) wrote a\r\nshort idyll on the attractive virtue of the lodestone\r\nand its symbolism; St. Augustine (354-430),\r\nin his work De Civitate Dei, records the\r\nfact that a lodestone, held under a silver plate,\r\ndraws after it a scrap of iron lying on the plate.\r\nAbbot Neckam, the Augustinian (1157-1217),\r\ndistinguishes between the properties of the two\r\nends of the lodestone, and gives in his De Utensilibus,\r\nwhat is perhaps the earliest reference to\r\nthe mariners compass that we have. Albertus\r\nMagnus, the Dominican (1193-1280), in his\r\ntreatise, De Mineralibus, enumerates different kinds\r\nof natural magnets and states some of the properties\r\ncommonly attributed to them; the minstrel,\r\nGuyot de Provins, in a famous satirical poem,\r\nwritten about 1208, refers to the directive quality\r\nix\r\nof the lodestone and its use in navigation, as\r\ndo also Cardinal de Vitry in his Historia Orientalis\r\n(1215-1220); Brunetto Latini, poet, orator\r\nand philosopher, in his Trsor des Sciences, a veritable\r\nlibrary, written in Paris in 1260; Raymond\r\nLully, the Enlightened Doctor, in his\r\ntreatise, De Contemplatione, begun in 1272, and\r\nGuido Guinicelli, the poet-priest of Bologna,\r\nwho died in 1276.\n\u003cb\u003e ......Buy Now (To Read More)\u003c\/b\u003e\u003c\/p\u003e\u003ch3\u003eProduct details\u003ch3\u003e\u003c\/h3\u003e\n\u003c\/h3\u003e\u003cp\u003e\u003cb\u003eEbook Number\u003c\/b\u003e: 50524 \u003cbr\u003e\u003cb\u003eAuthor\u003c\/b\u003e: Pierre, de Maricourt \u003cbr\u003e\u003cb\u003eRelease Date\u003c\/b\u003e: Nov 21, 2015 \u003cbr\u003e\u003cb\u003eFormat\u003c\/b\u003e: eBook \u003cbr\u003e\u003cb\u003eLanguage\u003c\/b\u003e: English \u003cbr\u003e\u003c\/p\u003e\u003ch3\u003eContributors\u003ch3\u003e\u003c\/h3\u003e\n\u003c\/h3\u003e\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eTranslator\u003c\/b\u003e: Arnold, Brother, 1868- \u003cbr\u003e\u003c\/p\u003e","brand":"booksdeli.com","offers":[{"title":"Pierre, de Maricourt,active 13th century \/ eBook \/ English","offer_id":43222114467997,"sku":"gb-50524-ebook","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0619\/5648\/9373\/products\/50524_ed8a7a59-9192-4301-9981-abf38eac1f73.jpg?v=1671773214"},{"product_id":"the-collected-writings-of-edward-leedskalnin-magnetic-current-a-book-in-every-home-9781684931804","title":"The Collected Writings of Edward Leedskalnin: Magnetic Current \u0026 A Book in Every Home","description":"\u003cp\u003eThe Collected Writings of Edward Leedskalnin is a compilation of two of Leedskalnin's works, Magnetic Current and A Book in Every Home. This eccentric sculptor and amateur scientist devoted most of his life to creating a large complex of megalithic stones that he quarried and carved himself. \u003c\/p\u003e\u003cp\u003eEdward Leedskalnin was born in Latvia in 1887. Although he only received formal education up to the fourth grade, he was very inquisitive and spent a large part of his youth reading. He was said to be a sickly boy and grew into a small man-reportedly measuring just 5 feet tall and weighing 100 lbs. \u003c\/p\u003e\u003cp\u003eAt age 26, he was engaged to marry a 16-year-old girl named Agnes Skuvst, but the wedding was called off. Accounts differ, some claiming the wedding was canceled the day before it was scheduled and others saying that Leedskalnin was jilted at the altar. Regardless, he was heartbroken and shortly after emigrated to America. \u003c\/p\u003e\u003cp\u003eAfter reaching New York in 1912, he continued on to Oregon where he worked for an ax-handle manufacturer. By 1923, he had contracted tuberculosis. The illness prompted him to move to a warmer climate for his health. He chose Florida, where he purchased an undeveloped acre of land in Florida City. \u003c\/p\u003e\u003cp\u003eIt was on this modest plot that he began Rock Gate (later renamed Coral Castle). This ambitious project involved extracting enormous pieces of oolite stone from his land, moving them into position, and carving them-entirely alone. The pieces include sculptures and carved stone furniture, as well as a two-story tower that served as his living quarters. \u003c\/p\u003e\u003cp\u003eThe project was devoted to his \"Sweet Sixteen,\" the woman who had rejected him many years earlier.\u003c\/p\u003e\u003cp\u003eDue to the scale of the project, some have dubbed it \"Florida's Stonehenge.\" While it's unclear how Leedskalnin was able to complete it, it is all the more impressive considering his small stature and questionable health. \u003c\/p\u003e\u003cp\u003eWhen he wasn't hewing or carving stone, Leedskalnin was also conducting experiments and writing. His first published work was a pamphlet titled A Book in Every Home, published in 1936. The book is divided into three parts, with the first section focusing on Leedskalnin's views on relationships and education. In the second section, Leedskalnin offers his opinions on domestic arrangements and the raising of children. And in the third, he shares his views on voting and the role of government, advocating that \"the weaklings\" should not be allowed to vote. \u003c\/p\u003e\u003cp\u003eLeedskalnin also spent two years testing magnets and recording his findings from Rock Gate. These experiments would form the basis of Magnetic Current, published in 1945. In the book, Leedskalnin argues that electricity and magnetism are not separate phenomena but are instead two aspects of the same fundamental force, which he calls \"magnetic current.\" He also proposes a new model of atomic structure and suggests that the fundamental particles of matter are tiny magnets that are constantly in motion.\u003c\/p\u003e\u003cp\u003eLeedskalnin presents a variety of experiments throughout the book, many of which involve the manipulation of magnetic fields using simple items like various magnets, car batteries, light bulbs, and coils of wire. He believed that his discoveries could provide insights into the mysteries of the universe, including the relative positions of the celestial bodies.\u003c\/p\u003e\u003cp\u003eBoth works demonstrate Leedskalnin's unique view of the world and his eccentric personality. While some of his ideas may be seen as outdated or controversial, the books offer an intriguing glimpse into the mind of a self-taught philosopher and inventor who had a unique perspective on the world around him.\u003c\/p\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eAuthor:\u003c\/b\u003e Edward Leedskalnin\u003cbr\u003e\u003cb\u003ePublisher:\u003c\/b\u003e Mockingbird Press\u003cbr\u003e\u003cb\u003ePublished:\u003c\/b\u003e 06\/09\/2023\u003cbr\u003e\u003cb\u003ePages:\u003c\/b\u003e 50\u003cbr\u003e\u003cb\u003eBinding Type:\u003c\/b\u003e Hardcover\u003cbr\u003e\u003cb\u003eWeight:\u003c\/b\u003e 0.54lbs\u003cbr\u003e\u003cb\u003eSize:\u003c\/b\u003e 9.00h x 6.00w x 0.25d\u003cbr\u003e\u003cb\u003eISBN:\u003c\/b\u003e 9781684931804\u003cbr\u003e\u003cbr\u003e\u003ci\u003eThis title is not returnable\u003c\/i\u003e\u003cbr\u003e","brand":"booksdeli.com","offers":[{"title":"Edward Leedskalnin \/ Hardcover \/ English","offer_id":47350193160349,"sku":"9781684931804","price":45.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0619\/5648\/9373\/files\/img_d891dee6-6fae-43e6-b0c4-05c88c03140c.jpg?v=1761681130"},{"product_id":"signals-from-the-subatomic-world-how-to-build-a-proton-precession-magnetometer-9781887187008","title":"Signals from the Subatomic World: How to Build a Proton Precession Magnetometer","description":"The discovery of nuclear magnetic resonance earned Felix Bloch and Ed Purcell the 1952 Nobel Prize in Physics. What their discovery took advantage of, is that protons are the world's smallest magnets. These tiny magnets can also be used to make a magnetometer, of the type described in this book. This book describes how to build a proton precession magnetometer, suitable for measurements of the Earth's magnetic field. This method of measuring magnetic fields offers the theoretically highest possible precision, limited only by the known value of the gyromagnetic ratio of the proton. Uses of the magnetometer include: making precise measurements of the Earth's magnetic field, calibrating low field magnetometers, teaching modern signal processing techniques, demonstrating nuclear magnetism and NMR to students, and measuring nuclear magnetic relaxation in liquids. The Earth's field proton precession magnetometer, called the Magnum, described in this book, was formerly a commercial product, developed and sold by Exstrom Laboratories LLC. It was designed by Stefan Hollos and Richard Hollos.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eAuthor:\u003c\/b\u003e Stefan Hollos,Richard Hollos\u003cbr\u003e\u003cb\u003ePublisher:\u003c\/b\u003e Abrazol Publishing\u003cbr\u003e\u003cb\u003ePublished:\u003c\/b\u003e 05\/01\/2008\u003cbr\u003e\u003cb\u003ePages:\u003c\/b\u003e 164\u003cbr\u003e\u003cb\u003eBinding Type:\u003c\/b\u003e Paperback\u003cbr\u003e\u003cb\u003eWeight:\u003c\/b\u003e 0.47lbs\u003cbr\u003e\u003cb\u003eSize:\u003c\/b\u003e 8.50h x 5.50w x 0.38d\u003cbr\u003e\u003cb\u003eISBN:\u003c\/b\u003e 9781887187008\u003cbr\u003e\u003cbr\u003e\u003ci\u003eThis title is not returnable\u003c\/i\u003e\u003cbr\u003e","brand":"booksdeli.com","offers":[{"title":"Stefan Hollos \/ Paperback \/ English","offer_id":47629490225309,"sku":"9781887187008","price":42.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0619\/5648\/9373\/files\/img_fec6c2ff-620e-4336-9ccd-a4fe95998651.jpg?v=1770190203"}],"url":"https:\/\/booksdeli.com\/collections\/science-physics-magnetism.oembed","provider":"booksdeli.com","version":"1.0","type":"link"}