87 



assimilaling-power. This facl in part explains why Oxalis in Na- 

 ture can support on the average Ihe lowesl liglil-inlensity. 



10. In Nasturtium, Atriplex, and olher sun-planls, in normiil air, 

 an e(iuilibiium between respiration and assimilation is reaclied at 



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