— 255 - 



Table III. Sambucus nigra, sun -leaves. 



Nr. 



Date 



Area of leaf in square 

 centimeters (upper + 

 lower surface) 



Rate of air current 

 in minutes for 1 1 



w 

 S 

 .5 

 '3 



Q 



O 



Mean Co 2 content of 

 air in the receiver 



Tempe- 

 rature 



C0 2 absorbed per 

 hour per 50 cm 2 of the 

 upper surf. + 50 cm 2 



of the lower surf. 



OC, absorbed corr. 

 for temperature and 

 C0 2 content 



Intensity of light 

 (Bunsen's units) 



Size of stomatal 

 openings 



± 



öU h lo 



44.0 



32 



u. <o 



0.56 





1.6 



1.4 



12.0 





o 

 L 



* 



44;0 



30 



u. to 



0.65 



ODO 



23 



0.9 



0.6 



1.7 





o 

 O 





44.0 



33 



U. i 0 



0.80 



OQO 



-f-0.4 



-h0.3 



0 





A 



'i: 





44.0 



30 



u. 1 0 



0.65 





0.9 



0.8 



60.0 





C 



0 



27/ 1/1 

 a 17 14 



68.2 



30 



U.DO 



0.48 



1 70 



1.2 



1.6 



8.1 



2 



O 



* 



68.2 



30 



U.DO 



0.56 



1 70 

 1 1 



0.7 



0.8 



2.7 



2 



7 

 I 





68.2 



30 



U.oo 



0.74 



1 70 

 1 i 



-f 0:4 



-T-0.5 



0 



2 



Q 

 O 



30 / 1/1 

 öu /7 14 



52.0 



27 



u.oy 



0.44 



OA O 



Z4 



1.3 



1.3 



13.5 



2 



9 





52.0 



27 



0.59 



0.51 



24° 



"0.7 



0.6 



3.3 



2 



10 





52.0 



27 



0.59 



0.42 



30° 



1.5 



1.1 



45.0 



2 



11 



31 / 7 14 



30.0 



29 



0.62 



0.43 



25° 



2.6 



2.5 



15.0 





12 



14 



19.2 



22 



0.67 



0.56 



27° 



3.1 



2.0 



13.5 





13 



s / 8 14 



16.8 



28 



0.65 



0.55 



25° 



2.6 



1.9 



15.0 





14 



8 / 6 17 



48.0 



32 



0.55 



0.42 



18° 



1.0 



1.5 



5.4 



0-1 



15 



» 



48.0 



31 



0.55 



0.49 



19° 



0.5 



0.6 



1.5 



0-1 



16 



» 



48.0 



32 



0.55 



0.56 



19° 



-f-0.1 



-f-0.1 



0.6 



0-1 



17 



» 



48.0 



31 



0.55 



0.62 



20° 





-=-0.6 



0 



0-1 



18 



9 / 6 17 



100.0 









16° 



— 0.7 



-5-0.9 



0 





19 



22 / 6 17 



62.0 









20° 



-r-0.4 



-f-0.4 



0 





20 



27 / 6 17 



16.0 



28 



0.57 



0.47 



25° 



2.7 



2.3 



6.0 



2 



21 



» 



26.0 



28 



0.57 



0.54 



20° 



0.5 



0.5 



1.5 



l-(2) 



22 



24 / 7 17 



9.2 



31 



0.57 



0.51 



22° 



2.5 



2.4 



ca.10.0 



1 



23 



» 



13.8 



30 



0.57 



0.48 



22° 



2.6 



2.6 



7.0 



1-2 



