436 Mr. D. Thoday. Experimental Researches on [Mar. 1, 



Table VII. 



Leaf. 



Hate of 

 increase, in 

 milligrammes. 



Average of 

 hygroscope 

 readings. 



Experimental data. 







Experiment 6. 



1 



2 

 3 

 4 



<; 

 o 



6 

 7 

 8 

 9 

 10 

 11 

 12 



8-4 



0 "4 



2- 4 

 0-6 



O 



8-3 

 10-2 



3- 7 

 3-8 

 2-5 



12 -9 

 7-2 



31 

 31 



35 

 25 

 33 

 36 

 33 

 35 

 38 

 38 

 40 

 26 



August 4, 1909 ; detached leaves. 



Cut, 7.30 A.M. Exposed in open from 

 11 A.M. till 5.15 P.M. (6i hours). Maxi- 

 mum sun temperature, 27° "8 C. Bright 

 sunshine, with rare clouds ; breezy. 



Stamping method : Leaves 1 — 7, 40 sq. cm. ; 

 asymmetry error, average ± 2 '0 milli- 

 grammes, maximum ±4*5 milligrammes. 

 Leaves 8 — 12, 20 sq. cm. ; asymmetry 

 error, average ± 3 '5 milligrammes, maxi- 

 mum ±7 milligrammes. 



Average 



5-3 



33 



Probable asymmetry error ±0 '7 milligramme. 







Experiment 7. 



13 

 14 

 15 

 16 

 17 

 18 



6-4 

 8 -6 



—0 -7 

 4-6 

 3-7 



-1 -5 



69* 

 54 

 61 

 44 

 . 39 

 23 



July 6, 1908 : detached leaves. 



Cut, 7 A.M. Exposed in greenhouse from 

 10.20 A.M. till 4.30 P.M. (6 hrs. 10 mins.). 

 Cloudy, clearing to bright sunshine. 

 Maximum sun temperature, 32° C. 



Templet method : 40 or 50 sq. cm. Correc- 

 tion for shrinkage by marking leaves.f 



Asymmetry error, average ±2 '5 milli- 

 grammes, maximum ±4 milligrammes. 





3-5 



47 • 



Probable asymmetry error ± 1 milligramme. 







Experiment 8. 



19 

 20 

 21 

 22 

 23 



5- 4 

 2-6 



-0 -4 



6- 7 

 2-8 



44* 



36 



36 



32 



29 



July 3, 1908 : attached leaves. 



7 A.M. to 3 P.M. (8 hours). Shade tempera- 

 ture, 22 — 23° C Continuous sunshine. 



Templet method : 40 or 50 sq. cm. Correc- 

 tion for shrinkage by marking leaves.f 



Asymmetry error, average ±2 milligrammes, 

 maximum ±3 milligrammes. 





3 -4 



35 



Probable asymmetry error ± 1 milligramme. 



• Different hygroHcopes were used in the three oxperimonts, so that the readings are only 

 comparable witliin a single experiment. 



t See p. 423 and Thoday, loc. cil., pp. 23 and 37. 



