6 



FRANCIS E. LLOYD 



TABLE lit 



The same. Piece No. 3 



Loss not regained : 0.3. Weight of piece, about 140 grams. 



with relatively small error. For the present, also, the potometer 

 serves, when the data derived by it are compared with the data 

 derived gravimetrically, to disclose, with a high degree of accuracy, 

 a constantly changing ratio between the water transpired and that 

 taken up, as follows. 



During the hours of the night, the intake of water is constantly 

 in excess of the outgo. At some moment between the hours of 

 five and six in the morning, the rates are equal. During the earlier 

 part of the day the outgo is in excess of the intake. 



