S. W. Tiahan-<Deuble-Shas Discoveries. 31 
Arr. IV.—Double-Star Discoveries with the 183-inch Chicago 
Refractor ; by 8. W. Burnwam. 
THE new double stars described below were discovered with 
the 184-inch Clark refractor of the Dearborn Observatory, on 
the nights of October 1, 2, 4, 7, 10, 11, 15, 16, and 17, 1876, 
and are some of the results obtained in the use of that instru- 
Servers in Kurope; and a considerable time might elapse before 
the objects would be re-observed elsewhere. It is nec 
State, In explanation of its manifest incompleteness, that the 
work was unexpectedly, and without notice, terminated by the 
action of the officers of the Chicago Astronomical Society 
which has control of the instrument, and no opportunity has 
been afforded to complete the projected series of observations 
Which was but just commenced. Rewiaph is given, however, to 
show the value and effectiveness of the telescope in this impor- 
tant branch of astronomical research; and how much might be 
Accomplished for science, if it were used for any other purpose 
than exhibition to visitors. 
_ The reference numbers attached to these stars are the numbers 
™m ty double-star catalogues, seven of which lists, with the 
No. 437=—L 4291. 
R. A.=—=2" 12™ 26° 
Decl.=-+-3° 39’ 
