UNITED STATES GEOLOGICAL SURVEY 
CHARLES I). WALCOTT, DIRECTOR 
RECONNAISSANCE 
IN THE 
10 GRANDE COAL FIELDS OF TEXAS 
BY 
THOMAS WAYLAND VATJG-HAN 
INCLUDING A REPORT ON IGNEOUS ROCKS FROM THE SAN CARLOS COAL 
FIELD, BY E. C. E. LORD 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1900 
