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Indeed, Schaeberle and Colton had already, in 1896, determined the height of a Leonid by means of photographs taken at stations on different ridges of Mount Hamilton; and Professor Pickering has prosecuted similar work at Harvard, with encouraging results. Everything in this branch of science depends upon how far they can be carried.
When last examined at Tulse Hill, March 24, all the more essential features of its prismatic light were still faintly recognisable. It was then of about the sixteenth magnitude. But on August 17 it had sprung up to the tenth, as Professors Holden, Schaeberle, and Campbell perceived with amazement on turning the same instrument upon its place.
Possibly it is much distended by heat, and undoubtedly its atmosphere intercepts a very much smaller proportion of its light than in stars of the solar class. As regards Procyon, visual verification was awaited until November 13, 1896, when Professor Schaeberle, with the great Lick refractor, detected the long-sought object in the guise of a thirteenth-magnitude star. Dr.
On September 8, 1890, Barnard saw the first elongated and bisected by a bright equatorial belt, during one of its dark transits; and his observation, repeated August 3, 1891, was completely verified by Schaeberle and Campbell, who ascertained, moreover, that the longer axis of the prolate body was directed towards Jupiter's centre.
Burnham and Schaeberle secured at Cayenne some excellent impressions, showing enough of the corona to prove its identical character with that depicted in the beginning of the year, but not enough to convey additional information about its terminal forms or innermost structure.
Yet, in 1895, it was found with the same instrument by Schaeberle, and has since been observed with the great Yerkes telescope, as well as by the observers at Mount Hamilton, so that the reality of the discovery is beyond a doubt.
Whatever were Professor Watson's personal qualifications, however, the long list of eminent astronomers who were his pupils during the years from 1863 to 1879 are ample evidence of his genius, for they include such names as those of his successor Professor Harrington, '68, Otto J. Klotz, '72e, of the Observatory of the Dominion of Canada, Monroe B. Snyder, '72, Director of the Philadelphia Observatory, Robert Simpson Woodward, '72e, President of the Carnegie Institution, John M. Schaeberle, '76e, Astronomer in the Lick Observatory from 1888 to 1897, and George Cary Comstock, '77, Director of the Observatory of the University of Wisconsin.
The names of Barnard, Campbell, and Schaeberle immediately became well known in astronomy, owing to the excellence of their work. Burnham was, of course, no beginner, being already well known, nor was Keeler, who was also on the staff.
Schaeberle, which, as his claim to priority is undisputed, is often allowed to bear his name, although designated, in strict scientific parlance, comet 1881 iv. It was observed in Europe after three days, became just discernible by the naked eye at the end of July, and brightened consistently up to its perihelion passage, August 22, when it was still about fifty million miles from the sun.
The ellipticity of its companions was determined by Pickering and Douglass; indeed, that of No. 3 had long previously been noticed by Secchi. No. 3 also shows equatorial stripes, perceived in 1891 by Schaeberle and Campbell, and evident later to Pickering and Douglass; nor need we hesitate to admit as authentic their records of similar, though less conspicuous markings on the other satellites.
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