LIAIN|T\/E)RIN 
SLIDES AND PRINTS 
of SPECIAL INTEREST at the present time, from 
recent astronomical photographs made at the 
Yerkes Observatory, can be supplied by 
The University of Chicago Press 
WE MENTION 
A fine Series of Photographs of 
Comet Morehouse a 
taken by Professor Barnard. Stereograms (on paper oF 8 
of this comet and plates of its spectrum. 
Various Photographs of 
Halley’s Comet 
Also 
taken at intervals from September 1909 to July babes: : 
copies from old prints and drawings made at previou . 
Saturn, Mars, and Jupiter — 
r 
recently obtained with the 40-inch telescope by Professo 
Barnard. 
Photographs of 
Spectroheliograms of 
Sun-Spots 
showing vortices in the solar atmosphere. 
Spectrograms of Rapid Spectroscopic 
Binary Stars 
maace hus : ; w 5 - 
Catalogue, referring to about 600 Astronomical Subjects, 7° 7 
available, will be sent free on request. 
—— 
Address Dept. P 
The University of Chicago Press ' 
Chicago, Illinois a a 
