tate of Gonnecticut 
PUBLIC DOCUMENT No. 47 
State Geological and Natural 
History Survey 
COMMISSIONERS 
ROLLIN S. WOODRUFF, Governor of Connecticut (Chazrman) 
ARTHUR TWINING HADLEY, President of Yale University 
BRADFORD PAUL RAYMOND, President of Wesleyan University 
FLAVEL SWEETEN LUTHER, President of Trinity College (Secretary) 
RUFUS WHITTAKER STIMSON, President of Connecticut Agricultural College 
SUPERINTENDENT 
WILLIAM NORTH RICE 
BULLETIN NO. 11 
HARTFORD 
Printed for the State Geological and Natural History Survey 
1908 
