16 Mr. D. Thoday. Experimental Researches on [June 11, 



Table VIII. — Helianthus tuherosus. 



A. — Using the rotating punch : discs cut from between outstanding veins, 20 to 42 

 from each half-leaf. In the experiments with single leaves, the percentage 

 differences are given to the nearest 0'5. 





(1) 



(2) 





mil ligrammes , 



per cent. 





Nil 



Nil 



2 



-7 



-3-5 



3 



Nil 



Nil 



» 4 



— 1 



— U o 



5 



+ 1 



+ 0-5 



« 



-6 



-2 -5 



7 



+ 9 



+ 3-0 



8 



-4 



-1-5 



9 



+ 5 



+ 2-0 



10 



-1 



-0-5 



11 



+ 2 



+ 1-0 





±3 



±1-4 





Nil 



Nil 



4 small leaves taken together — Experiment 12 



+ 1-9 



+ 0.7 



Table IX. — TIeliantlms tuherosus. 



B. — By templet method : total area cut from each half-leaf given for each experiment. 

 It was not recorded which dry weights correspond to right and left halves 

 respectively. 







(1) 



(2) 





sq. em. 



milligrammes. 



per cent. 





20 



8 5 



2-6 





70 



8-7 



2 -6 



» 3 



20 



5-5 



1 •() 



4 



40 



4 0 



1 -4 



Averages of 1—4 





d=0 -7 



±2-0 



Table K.— Tropceoluni majue. 



A. Experiments 1 — 4. Area of entire half-loaves by planimeter method : ai-eas between 



47 and G4 sq. cm. 



B. Experiment 6. By rotating punch : 60 discs from one half (whether left or right not 



recorded), r)4 from the other ; differing number due to different distribution of 

 veins on the two lialf-leaves. 





(1) 



(2) 





milligrammes. 



per cent. 





+ 9 



+ 3 -8 



2 



- G 



-2 1 





-t-12 



+ 4-0 



4 



+ 4 



+ 1 -5 



r, 



12 



4-8 





± 9 



±3-2 



