PROPAGATION" OF WILD-DUCK FOODS. 



19 



transplanting them. Mr. Dwight Lydell, of the Michigan State 

 fish hatchery, states that he has succeeded in propagating Potamo- 

 geton by means of seeds and of whole plants. He further states that 



Fig. 19. — Range of sago pondweed. (Black spots show where it has been successfully 



transplanted.) 



the most successful and largest growths have been on bottoms where 

 the mud is about 6 inches deep over sand or clay. By mowing the 

 plants in lakes where they are plentiful and scattering them about the 

 ponds, no trouble has been experienced in getting a good crop. 



