Alvan clark biography of george washington

(b. Ashfield, Massachusetts, 8 March 1804; d. Cambridgeport, Massachusetts, 19 August 1887); CLARK ALVAN GRAHAM (b.

Fall River Massachusetts, 10 July 1832; d. Cambridgeport, Massachusetts, 9 June 1897); CLARK GEORGE BASSETT (b. Lowell, Massachusetts, 14 February 1827; d. Cambridgeport, Massachusetts, 20 December 1891),

astronomical instrumentation

Three instument markes—Alvan Clark and his sons, George Bassett and Alvan Graham—figured importantly in the great expansion of astronomical facilities that occurred during the second half of the nineteenth century.

Clark was born in in in Ashfield, Massachusetts, where he spent his early years on his father's farm, working at the family mill.

Alvan Graham Clark, an American lens crafter and telescope maker, died June 9, , at age Alvan Clark, his father, was a pioneer in the building of large.

Alvan Clark (March 8, – August 19, ), born in Ashfield, Massachusetts, was an American astronomer and telescope maker.

Alvan Clark & Sons was an American maker of optics that became famous for crafting lenses for some of the largest refracting telescopes of the 19th and early.

Alvan Clark, an American portrait painter and telescope maker, was born Mar. 8, Until , Clark painted miniature portraits in his studio in Cambridge.

Almost every American observatory built during this period, and some observatories abroad, housed an equatorial refracting telescope and often auxiliary apparatus as well, made by the Clarks. Five times the Clarks made the objectives for the largest refracting telescope in the world; and the fifth of their efforts, the forty-inch lens at the Yerkes Observatory, has never been surpassed.

Their o