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. 
