"Joseph henry" Quotes from Famous Books
 ... improved edition, written scarce a twelvemonth ago, to find how ignorant Dr. Whewell appears to have been of the existence or value of the contributions to knowledge made on this side the Atlantic. The chapter on Electro-Magnetism does not allude to the discoveries of Joseph Henry, in regard to induced currents, and the adaptation of varying batteries to varying circuits,—discoveries second in importance only to those of Faraday,—and which were among the direct means of leading Morse to the invention of the telegraph. The chapters ...
— The Atlantic Monthly, Vol. II, No. 8, June 1858 • Various
... Benjamin Pierce of Harvard University; Lieutenant Charles H. Davis, U. S. N.; Professor O. M. Mitchell, Superintendent of the Cincinnati Observatory; Dr. A. L. Elwyn of Philadelphia; Professor Walter R. Johnson of Washington; Professor Joseph Henry, Secretary of the Smithsonian Institution; William C. Redfield of New York; and an unusual number of amateur scholars from various parts of the Union. There were several papers of remarkable value, among which that of Mr. Squier, our Charge d'Affaires for Central America, was perhaps at ...
— International Miscellany of Literature, Art and Science, Vol. 1, - No. 3, Oct. 1, 1850 • Various
... formulated in his caveat and described in his original patent, is to be found among the essentials of modern telegraphy. They had mostly been abandoned before the first line had been completed, and the arrangements of his associate, Vail, were substituted. Professor Joseph Henry had, in 1832, constructed an electromagnetic telegraph whose signals were made by sound, as all signals now are in the so-called Morse system. He hung a bar-magnet on a pivot in its center as a compass-needle is hung. He wound a U-shaped piece of soft iron with insulated wire, and made it ...
— Steam Steel and Electricity • James W. Steele |
