192 



PLANKTON OF WISCONSIN LAKES 



Table 17. Maximum, minimum, and mean quantities of material 

 in the nannoplankton of Lake Mendota expressed in milligrams of dry 

 organic matter per cubic meter of water. Compare with the results 

 given for the net plankton in table 6. 



Table 18. This table shows the maximum, minimum, and mean per- 

 centages of nitrogen on an ash free basis in the nannoplankton of Lake 

 Mendota and also the quantity per cubic meter of water. Compare 

 with the net plankton in table 7. 



Table 19. The annual range of variations in the percentages and 

 in the amounts of crude protein in the nannoplankton of Lake Mendota. 

 These results are based on those given in table 18. Compare with the 

 net plankton, table 8. 



Table 20. The range of variation in the percentage and in the quan- 

 tity of ether extract in the nannoplankton of Lake Mendota. Compare 

 with the net plankton in table 10. 



