U NIXED STATES -GEOLOGICAL SURVEY 
LIB 
Washin^qton, D C, 
i3U 
PP^/// jyoa kindtyTeturn the %>ork -mentioned beto'w, vorro'wed by you from the 
Libra.ry of the United Stktes Geological Survey on the date named? 
Very respectfully 
Librarian 
