— 258 — 



Table VI. Oxalis acetosella. 



JNr. 



Date 



Area of leaf in square 

 centimeters (upper -f 

 lower surface) 



Rate of air current 

 in minutes for 1 1 



CO2 in air in mg per 1 



Mean CO2 content of 

 air in the receiver 



Tempe- 

 rature 



CO2 absorbed per 

 hour per 50 cm 2 of the 

 upper surf, -f 50 cm 2 



of the lower surf. 



CO2 absorbed corr. 

 for temperature and 

 CO2 content 



Intensity of light 

 (Bunsen's units) 



Size of stomatal 

 openings 



1 



3 / 8 14 





OQ 



0.65 



0.5b 



25° 



A H 



0.7 



0.5 



9.0 



1 



2 



14 / 5 16 



A Ct O 



4b.Z 



Ci A 



24 



A A I 



0.4/ 



0.38 



? 



1 A 



1.0 



1.4 



ca. 6.5 



0 



3 



28 /5 16 



ctr\ n 

 bO.O 



on 



2y 



O.o4 



0.41 



? 



A A 



0.9 



1.2 



0.5 



0 



4 



x / 6 16 



ict c\ 

 <b.O 



Cl A 



24 



r\ r a 



0.54 



0.55 



? 



. A 1 



-T- 0.1 



-T- 0.1 



0.4 



l-(2) 



5 



» 



<b.O 



23 



r\ r a 



0.54 



0.56 



? 



. AI 



0.1 



"T" 0.1 



0 



l-(2) 



6 



2 / 7 16 



oU.U 



07 

 Li 



a en 



0.57 



0.4b 



20° 



A Ct 



O.b 



a n 



0.7 



1 A A 



10.0 



0 



7 



» 



oU.O 



OK 



25 



0.57 



0.45 



20° 



A *7 



0.7 



A A 



0.9 



1 A A 

 10.0 



0 



8 



» 



80.0 



25 



0.57 



0.54 



20° 



0.2 



0.2 



0.2 



0 



9 



» 



80.0 



25 



0.57 



0.59 



20° 



-f-0.1 



-T-0.1 



0 



0 



10 



12 / 8 16 



65.0 



25 



0.65 



0.51 



21° 



1.0 



1.0 



12.0 





11 



» 



65.0 



24 



0.65 



0.58 



21° 



0.5 



0.4 



2.1 





12 



» 



65.0 



33 



0.65 



0.54 



21° 



0.6 



0.6 



3.0 





13 



13 / 8 16 



74.0 



31 



0.56 



0.44 



20° 



0.6 



0.8 



3.0 





14 



» 



74.0 



30 



0.56 



0.58 



20° 



-T-0.1 



-T-0.1 



0 





15 



» 



74.0 



31 



0.56 



0.49 



19° 



0.4 



0.5 



1.4 





16 



» 



74.0 



30 



0.56 



0.54 



19° 



0.1 



0.1 



0.3 





17 



» 



74.0 



30 



0.56 



0.57 



19° 



-rO.l 



-T-0.1 



0 





18 



» 



74.0 



30 



0.56 



0.54 



19° 



0.1 



0.1 



0.3 





19 



17 / 8 16 



40.0 



30 



0.57 



0.50 



21° 



0.7 



0.7 



13.5 





20 



» 



40.0 



30 



0.57 



0.51 



22° 



0.6 



0.6 



1.8 





21 



» 



40.0 



30 



0.57 



0.51 



22° 



0.6 



0.6 



2.4 





22 



» 



73.0 











-T-0.1 



-T-0.1 



0 





23 



18 / 9 16 



340.0 









13° 



-=-0.1 



-f-0.2 



0 







Table VII. Senecio silvaticus, shadow leaves. 





Nr. 



Date 



Area of leaf in square 

 centimeters (upper + 

 lower surface) 



Rate of air current 

 in minutes for 1 1 



CO2 in air in mg per 1 



Mea CO2 content of 

 air in the receiver 



Tempe- 

 rature 



CO2 absorbed per 

 hour per 50 cm 2 of the 

 upper surf. + 50 cm 2 



of the lower surf. 



CO2 absorbed corr. 

 for temperature and 

 CO2 content 



Intensity of light 

 (Bunsen's units) 



Size of stomatal 

 openings 



1 



3 /9 16 



48.0 



32 



0.54 



0.45 



16° 



0.7 



1.1 



4.5 





2 





48.0 



31 



0.54 



0.51 



16° 



0.2 



0.3 



0.8 





3 





48.0 



30 



0.54 



0.44 



16° 



0.8 



1.3 



4.5 





4 





48.0 



30 



0.54 



0.54 



16° 



0 



0 



0 





