APPENDIX 



189 



Table 11. Some of the physical and chemical constants of the ether 

 extract of three samples of net plankton as determined by Schuette. 

 (Trans. Wis. Acad. Sci., Arts, and Let., Vol. XIX, 1918, p. 599.) 



Table 12. The variations in the percentage and in the quantity of 

 the pentosans in the net plankton of Lake Mendota are indicated in 

 this table. 



Table 13. The changes in the percentage of crude fiber in the or- 

 ganic matter of the net plankton are shown for the different years in 

 this table, as well as the variations in quantity per cubic meter of 

 water. The mean percentage is based on the mean quantity of crude 

 fiber and the mean quantity of organic matter in the samples on which 

 crude fiber determinations were made. 



