Durbin, JOHN

PRICE, D.D.. LL.D., 1800-1876. Pres. Dick in son Coll. 1834-45; Sec. M. E. Mi ionary Society 1850-72; author of Observations in Europe and the East, 4 vols., 1844-45. Durchmusterung. Argelander's great survey of the northern heavens, completed 1846. Its results are embraced in a catalogue of approximate positions of 324,000 stars. In 1884 Schönfeld completed the extension of this survey to a distance 23 degrees s. of the equator. Recently, Thome of the Argentine Observatory has extended it to 42 degrees south declination. Schonfeld's catalogue contains places of 133,659 stars. Thome's catalogue will embrace 340,380 stars. Schonfeld's work embraces a larger proportion of faint stars than Argelander's and Thome's a larger proportion than Schonfeld's. The term is also applied to a photometric survey of the heavens in progre at Potsdam; also to a PHOTOGRAPHIC SURVEY (q.v.), two being now in progre .