The Silver Magnet PDF Download

Author: Grant Shepherd
Publisher: Acls History E-Book Project
ISBN: 9781597405843
Category : Biography & Autobiography
Languages : en
Pages : 316

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Author: Grant Shepherd
Publisher: ACLS History E-Book Project
ISBN:
Category : Biography & Autobiography
Languages : en
Pages : 374

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Author: John Mason Hart
Publisher: University of Arizona Press
ISBN: 9780816527045
Category : History
Languages : en
Pages : 264

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Book Description
In the great barranca known today as Copper Canyon, the small mining town of Batopilas once experienced a silver bonanza among the largest ever known. American investors, believing that Mexico offered an unexploited cornucopia, began purchasing mines in the Sierra Madre, seeking to expand their hold on natural resources outside U.S. borders. From 1861 until the Revolution of 1910, the men of the Batopilas Mining Company ruled the region using their wealth, armed might, and extensive connections. The technology, industrialism, and politics their interests brought to this remote community tied the Tarahumara, Yaqui, Mayo, and other peoples of the barrancas directly to the economies of the United States and China. Local society was revolutionized, and a dramatic tapestry of human interactions was created. Based on many volumes of mining company records, The Silver of the Sierra Madre exposes the mentality and methods of mine owners John Robinson and Alexander ÒBossÓ Shepherd, vividly detailing their exploitation of the people and the natural resources of Chihuahua. Hart aptly demonstrates the human and financial losses resulting from President Porfirio D’azÕs development programs, which relied on foreign investors, foreign managers, and foreign technology. This unprecedented work also provides a highly interesting ethnographic and social description of one of the least-known areas of Mexico. It is a tale of power and desperation, respect and arrogance, adventure and tragedy, and, ultimately, triumph and survival.

Author: William Gilbert
Publisher: Courier Corporation
ISBN: 0486163016
Category : Science
Languages : en
Pages : 440

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From the first great experimental scientist: the classic text, first published in Latin in 1600. Summarizes then-current knowledge of magnetism and electricity, offering insights into the origins of modern science.

Author: William Gilbert
Publisher: Lulu.com
ISBN: 1326494465
Category : Science
Languages : en
Pages : 160

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Book Description
This 'On The Magnet' is a new improved English translation of the widely censored or banned Latin 1600 'De Magnete' by William Gilbert which was the first real science book to be published. This version is rather easier to read than its two earlier translations, and significantly helps to clarify Gilbert's 'attraction' physics which Newton put as one of two basic valid mathematized physics options and which he is believed to have privately favoured. It is basically a novel signal-response or remote-control physics that may still have real relevance today.

Author: William Gilbert
Publisher:
ISBN:
Category : Blood
Languages : en
Pages : 468

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Author: Louise Spilsbury
Publisher: Gareth Stevens Publishing LLLP
ISBN: 1482441497
Category : Juvenile Nonfiction
Languages : en
Pages : 50

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Book Description
Magnets are all around us, but how do they work? This innovate book delves into that question and many more, showing readers how the pushes and pulls of magnetic force impact both our planet and everyday lives. Informative flowcharts bring magnetism concepts to life with bright colors and insightful fact boxes, giving readers extra incentive to learn more about magnetic materials, how magnets are used in motors, and much more.

Author: Carl Lumholtz
Publisher:
ISBN:
Category : History
Languages : en
Pages : 244

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The two classic historical texts on the Copper Canyon and the Tarahumara Indians.

Author: William Sturgeon
Publisher:
ISBN:
Category : Electricity
Languages : en
Pages : 662

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Author: Alanna Mitchell
Publisher: Penguin
ISBN: 1101985186
Category : Science
Languages : en
Pages : 342

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Book Description
The mystery of Earth's invisible, life-supporting power Alanna Mitchell's globe-trotting history of the science of electromagnetism and the Earth's magnetic field--right up to the latest indications that the North and South Poles may soon reverse, with apocalyptic results--will soon change the way you think about our planet. Award-winning journalist Alanna Mitchell's science storytelling introduce intriguing characters--from the thirteenth-century French investigations into magnetism and the Victorian-era discover that electricity and magnetism emerge from the same fundamental force to the latest research. No one has ever told so eloquently how the Earth itself came to be seen as a magnet, spinning in space with two poles, and that those poles have dramatically reversed many time, often coinciding with mass extinctions. The most recent reversal was 780,000 years ago. Mitchell explores indications that the Earth's magnetic force field is decaying faster than previously thought. When the poles switch, a process that takes many years, the Earth is unprotected from solar radiation storms that would, among other disturbances, wipe out much and possible all of our electromagnetic technology. Navigation for all kinds of animals is disrupted without a stable, magnetic North Pole. But can you imagine no satellites, no Internet, no smartphones--maybe no power grids at all? Alanna Mitchell offers a beautifully crafted narrative history of surprising ideas and science, illuminating invisible parts of our own planet that are constantly changing around us.