CARBON DIOXIDE CURVES 



895 



Fig. 27. 2A. Carbon .dioxide curves of Foniinalis aniipyretica at various light 

 intensities (in lux) (after Harder 1921). Abscissa, [CO2] in (mole/1.) X 10^ 



o Intensity 6.2 (20°C) 

 + Intensity 6.2 (I2''C ) 

 A Intensity 20(20°C ) 



^ 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 



COz, 0.001 vol.% 



Fig. 27.2B. Carbon dioxide curves of Hormidium flaccidum at two light in- 

 tensities (in relative units), and two temperatures (after van der Honert 1930). 

 0.01 volume per cent COo corresponds at 20 °C. to 3.37 X 10 -« mole/1, (c/. Vol. I, p. 

 174). 



