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Hassler, Ferdinand Rudolph 1770-

Scientist; born at Aernen, Switzerland, Oct. 6, 1770; was engaged in a trigonometrical survey of his native country, and was induced to come to America about 1807 by Albert Gallatin, then Secretary of the Navy. He was employed as Professor of Mathematics at West Point from 1807 to 1810, and in 1811 was sent by the government to Europe as scientific ambassador to London and Paris, to procure necessary implements and standards of measure for use in the projected coast survey (see coast and Geodetic survey, United States). He began that survey in July, 1816, and [310] left it in April, 1818, but resumed it in 1832, and continued its superintendent until his death, in Philadelphia, Nov. 20, 1843, when he was succeeded by Prof. Alexander D. Bache (q. v.). Professor Hassler made valuable contributions to the American Philosophical transactions on the subject of the coast survey, and in 1832 a report to the United States Senate on weights and measures. His name has been given to one of the coast survey steamers, which made a notable scientific expedition in 1871-72.

Harper and Brothers Publishers. . New York. 1902.

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