LIAINITIEIRIN 
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 
taken by Professor Barnard. Stereograms (on paper oF glass) 
of this comet and plates of its spectrum. 
Various Photographs of 
Halley’s Comet 
taken at intervals from September 1909 to July 1910. Also : 
copies from old prints and drawings made at previous 
Saturn, Mars, and Jupiter 
Photographs of 
recently dbesbied with the ceanak telescope by P rofessor = 
Barnard. 
Spectroheliograms of 
Sun-Spots 
showing vortices in the solar atmosphere. 
Spectrograms of Rapid Spectroscopic 
Binary Stars 
Catalogue, with appendices, referring to about 600 Astronomical - 
Subjects, now available, will be sent free on request. 
de 
Address Dept. P 
The University of Chicago Press 
Chicago, Illinois 
