BACK VOLUMES 



OF 



The Journal of Geology 



AT REDUCED PRICES 



This is the time to secure back numbers of the 

 Journal of Geology. 



Delay may mean failure to complete your set as 

 the numbers are becoming more difficult to find, 

 while a complete set is rare. 



OUR OFFER 



Until December 31, 1919, we will sell a limited 

 number of back volumes and single copies at a 

 reduction of 25 per cent from the published prices. 



SEND US YOUR ORDER NOW 



We have also files of the Astro physical Journal arid the 

 Botanical Gazette. 



THE UNIVERSITY OF CHICAGO PRESS 



CHICAGO - - - - ILLINOIS 



