61$^ t' ^ 
IAN 
PHYSICAL GEOGRAPHY 
AS MODIFIED BY HUMAN ACTION. 
BY 
GEORGE P. M ARSH. 
“ Not all the winds, and storms, and earthquakes, and seas, and seasons of the world, have 
done so much to revolutionize the earth as Man, the power of an endless life, has done since 
the day he came forth upon it, and received dominion over it.”—H. Bushnell, Sermon on. the 
Power of an Endless Life. 
* 
SAMPSON LOW, SON AND MARSTON, 14 LUDGATE HILL. 
1864. 
[ The right of Translation is reserved.] 
