Bond. I. William (ranch, an American astronomer, born in Portland, Me., Sept. 9, 1789, died in Cambridge, Mass., Jan. 29,1859. He was brought up by his father to the trade of watchmaking, but devoted much of his time from early youth to studying astronomy. He established a private observatory at Dorchester, Mass., and gained considerable reputation by his discoveries, and in 1838 was selected by the United States government to make observations for the use of an expedition to the South sea. He superintended the construetion of the observatory of Harvard university in 1839, and became its director when completed. From that time he was constantly engaged in astronomical observations and studies, and published the results in the " Annals of the Observatory of Harvard College." He also invented a device for visibly measuring time to a small fraction of a second, and was among the first to use photography as a means of recording the aspects of heavenly bodies. He received the degree of A. M. from Harvard university in 1842, and became a member of the academy of arts and sciences, of the philosophical society, and of the royal astronomical society of London. II. George Phillips, son of the preceding, born at Dorchester, Mass., May 20,1825, died in Cambridge, Feb. 17, 1865. He graduated at Harvard college in 1845, and became an assistant to his father in the observatory, succeeding to its full charge on the latter's death.

He wrote several valuable astronomical works, among which are a " Treatise on the Construction of the Rings of Saturn," and the " Elements of the Orbits of Hyperion and the Satellite of Neptune." The satellite of Neptune and the 8th satellite of Saturn were discovered by himself and his father. He received a gold medal from the royal astronomical society for a work on Donati's comet.