CONTENTS OF PART II. 



III. Discovery of Paleolithic Flint Implements in Upper Egypt. By Henry W. 



Haynes 357 



IV. General Properties of certain Partial Differential Equations similar to those of 



Hydrodynamics. By Thomas Craig 362 



V. A Comparison of the Harvard College Observatory Catalogue of Stars for 1875.0 

 with I he Fundamental Systems of Auwers, Safford, Boss, and Newcomb. 

 By William A. Rogers 389 



