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Harper's Encyclopedia of United States History (ed. Benson Lossing) 2 2 Browse Search
George Meade, The Life and Letters of George Gordon Meade, Major-General United States Army (ed. George Gordon Meade) 1 1 Browse Search
William Alexander Linn, Horace Greeley Founder and Editor of The New York Tribune 1 1 Browse Search
Francis Jackson Garrison, William Lloyd Garrison, 1805-1879; the story of his life told by his children: volume 2 1 1 Browse Search
Thomas Wentworth Higginson, Massachusetts in the Army and Navy during the war of 1861-1865, vol. 2 1 1 Browse Search
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Browsing named entities in George Meade, The Life and Letters of George Gordon Meade, Major-General United States Army (ed. George Gordon Meade). You can also browse the collection for April 28th, 1859 AD or search for April 28th, 1859 AD in all documents.

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George Meade, The Life and Letters of George Gordon Meade, Major-General United States Army (ed. George Gordon Meade), chapter 3 (search)
he relay-magnet during the passage of the stars between the meridians. But, he adds, as the whole amount of this pass was found, from careful experiments, not to exceed 0.03 of a second (three hundredths) its variation in 6.5 minutes (difference of longitude, in time) may be considered as an inappreciable quantity, insensible in comparison with the other errors inseparable from all observations with field instruments. Professor Young remarks, in his official report to Captain Meade, of April 28, 1859, in regard to the modification described: I believe no other arrangement has ever hitherto effected this double-clock record of each observation, the desirableness of which yourself first suggested to me. In the telegraphic determination of longitude, just described, Lieutenant C. N. Turnbull was associated with Professor Young. It was under the direction of Captain Meade that Lieutenants Turnbull and Poe did considerable astronomical work, and Lieutenant Smith a good deal of magneti