Peeps Into The Human Hive (volume 1)

Paperback | February 2, 2012

byAndrew Wynter

not yet rated|write a review
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1874. Excerpt: ... POSTAL TELEGRAPHS. In tracing out the beginning of any great scientific discovery, it is instructive to consider upon what apparently inconsiderable elements it is built up. Just as the raised beach which withstands the most dangerous seas and makes new geographical outlines is constructed of loose stones, thrown together by various agencies, totally ignorant of what will be the result of their labours, so many of our most important inventions have been prepared unconsciously by different minds, until some comprehensive genius links them together for a great purpose. No discovery of modern times better illustrates this observation than that of the electric telegraph. The bare fact that a flash of electricity would traverse a wire of considerable length was discovered by Grey and Wheeler as far back as 1729; and this may be considered the first step in the discovery; but it was wholly sterile, in the absence of any means by which the current could be made to speak. Nearly a century elapsed before Oersted, in 1819, invented this tongue in the shape of the magnetic needle, which, upon being placed on a pivot parallel to a coil of wire charged with an electric current, assumed a position at right angles to it; this tongue was only capable of making one motion or sign, but this was sufficient to set other minds upon the track. Arago in the same year discovered that the electric fluid possessed the power of imparting magnetism to soft iron, and our own countryman, Sturgeon, by simply coiling fine copper wire insulated with silk round a piece of this metal, invented the electro-magnet. Hence, by the mere fact of making or breaking contact, the iron became magnetised or demagnetised; or, in other words, motion was produced at the end of a distant wire, by means o...

Pricing and Purchase Info

$27.95

Out of stock online

From the Publisher

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1874. Excerpt: ... POSTAL TELEGRAPHS. In tracing out the beginning of any great scientific discovery, it is instructive to consider upon what app...

Format:PaperbackDimensions:76 pages, 9.69 × 7.44 × 0.16 inPublished:February 2, 2012Publisher:General Books LLCLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:0217937837

ISBN - 13:9780217937832

Customer Reviews of Peeps Into The Human Hive (volume 1)

Reviews