280 MILDRED SPARGO 



months of September and October, when the leaves were in the 

 same condition as those used by Molisch. Again negative re- 

 sults were obtained. 



The accompanying tables give the results of experiments 

 carried on in precisely the same manner, and under exactly the 

 conditions described by Molisch. It will be noticed that leaves 

 of various forms and degrees of succulency were used; — the 

 membranaceous ones of Pirus, subcoriaceous leaves of Vitis, 

 coriaceous leaves of Hydrangea, the tomentose ones of Tilia, 

 succulent, closely growing leaves of Sedum, and the compound 

 leaves of Robinia and Daucus. 



As will be noted, the readings were sometimes continued for 

 14 days or more, to obtain a possible rise from fungal or bac- 

 terial growths — Molisch's " second maximum." 



