390 BOARD OF AGRICULTURE. [Pub. Doc. 



hay and root crops. Imperfect as this experiment has been, 

 it serves to assure us as to the great possibilities which are 

 open to drainage processes of this description. 



(For further information on this subject of marine 

 marshes, see preliminary report on the sea-coast swamps of 

 the eastern United States, by N. S. Shaler, sixth annual 

 report of the director of the U. S. Geological Survey, 

 pp. 353-398, Washington, 1886. For further information 

 concerning fresh-water morasses, see general account of the 

 fresh-water morasses of the United States, with a descrip- 

 tion of the dismal swamp of Virginia, by N. S. Shaler, pp. 

 255-339, Washington, 1890.) 



