U. S. GEOLOGICAL SURVEV 
BULLETIN NO. 180 PL. 
* <vS«' 
RUB/-BEAR 
AVEL AT CALER FORK, COWEE VALLEY 
COUNTY, N. C. 
RUBY MINE AT COWEE VALLEY : N. C. 
Plant for washing the gravels is shown in the foreground; a, sluice box; b, sieve boxes; C. rocker. 
