Smithsonian Report, 1928. — Barrel 



Plate 2 



X « 



1- *V/v?^'iS 















A Portion of the Southern Hemisphere of the Moon 



AlJittle below the center is the crater Tycho, 65 miles in diameter, distinguished by its sharp rim and 

 central cone. Above and to the right is the large crater Clavius, 142 miles in diameter. Its greater 

 age is shown by its crumbled walls and the number of younger, sharply defined craters superim- 

 posed upon its bottom and wall. Below, at the extreme north, is seen the margin of the Mare 

 Nubium. (Photograph by Yerkes Observatory) 



