1909.] Vegetable Assimilation and Respiration. 



17 



Table XI. — Lime. 



A. Experiineiits 1 and 2. By planimeter method : area about 30 sij. cm. 



B. E.xperimonts 3 and 4. By rotating punch. Experiment 3, 10 discs ; 



Experiment 4, 13 discs. 





(1) 



(2) 



Single leaves — Experiment 1 



2 



3 



i " ' 



milligrammes. 

 -13 

 + 28 

 + 15 

 + 4 



per cent. 

 -3-3 

 + 4-4 

 + 4-0 

 + 1-0 



Table XII. — Cercis. By rotating punch. 

 Number of discs 17 — 20. 







(2) 



Single leaves — Experiment 1 



milligrammes. 



per cent. 



+ 15 



+ 3 



2 



+ 9 



+ 2 'o 



Farther E.vperwients on Asymmetry. 



The experiments in Tables XIII and XIV were performed in connection with assimila- 

 tion experiments. The leaves were cut from trees in the University Botanic Gai'den in 

 the early morning, while they were still wet with dew, were carried to the laboratory, 

 wrapped in a damp cloth in a vasculum, and used at once. 



Templets were used in all the experiments. 



Tabic XIII. — Paulownia imperialis. 



Tlu-ee leaves furnished material for six experiments ; in four of these, only pieces 

 without prominent veins were cut, in the other two the pieces included minor outstanding 

 veins. 



The area is given for each experiment. Where two pieces were cut from each half-leaf 

 for a single experiment, the areas of the individual pieces are connected by a jilus sign. 



Leaf. 



Portion. 



(1) 



(2) 







Avoiding 



veins. 









sq. era. 



milligrammes. 



per cent. 



1 



1 



30 



+ 9-7 



+ 1-5 



1 



2 



10 + 10 



+ 9-5 



+ 1-6 1 



2 



1 



21 + 10 



- 6 1 



-0-9 



3 



1 



21 + 10 



+ 9-7 



+ 1-6 







Including 



veins. 



1 



2 



2 



21 + 15 



-39 -7 



-5-9 1 



3 





20 



-33 -5 



-6 -0 



VOL. LX.XXn. — B. (J 



