1009 



onlj tlie figures which have reference to the above-mentioned 

 irregularity in the regulation of transpiration. 



The boughs for experiment were arranged at an open window, 

 where they were not reached by the sun before mid-day, and only 

 for a short time afterwards. 



The results of these experiments are more intelligible when repre- 

 sented in the following way -. 



6Ü^ 



