MAP SHOWING THE EXTENT OF THE 
HYDRAULIC MINING OPERATIONS » 
NEAR GOLD RUN, DUTCH FLAT, LITTLE YORK, YOU BET, CHALK BLUFFS, RED DOG, 
HUNT’S HILL, AND QUAKER HILL, ON BEAR RIVER AND CANON, 
STEEP HOLLOW AND GREENHORN CREEKS. : 
MAP OF THE 
TERTIARY AURIFEROUS GRAVEL DEPOSITS 
LYING BETWEEN THE MIDDLE FORK OF THE AMERICAN: AND THE MIDDLE 
YUBA RIVERS, INCLUDING THE PRINCIPAL HYDRAULIC 
MINING REGION OF THE STATE. 
East Half, corrected and revised ; to replace the copy of the same sheet given with Part I. 
SN 
Niche 
To accompany Memoirs of the Museum of Comp. Zodlogy, Vol. VI. No. 1. (Part IL.) 
1880. 
