DEFARTMCNT or COMMLRCE AND LABOR 



BUREAU OF FISHERIES 



THE CENTRAL PORTION OF 



DEVILS LAKE, N. DAK. 



SHOWinC THL DEPTH AND SPtCIFIC GRAVITY Of THE WATQR 

 AND THC CHARACTER Of THE BOTTOM . AS DETERMINED BY 

 THE BUREAU OF FISHERIES DURING THE SUMMER OF 1907 



