THE CONSERVATION OF OUR OYSTER SUPPLY. 15 



FIG. 10. EXAMINING A TILE COVERED WITH OYSTER SPAT. 



ponds ; but the result in the latter seems to be much more satis- 

 factory. The pond, having been macadamized, is first thoroughly 

 dried " for two months, . . . doing away with all animal and plant 



FIG. 11. DISENGAGING SEED OYSTERS FROM A TRAY COLLECTOR. 



