326 



BOTANICAL GAZETTE 



[NOVEMBER 



was determined separately (by the method previously described); 

 so the Kjeldahl determination was conducted without any modifica- 



14 IS IS 



Fig. 5. — Nitrogen compounds in leaves 



tion for nitrates. (Previously zinc was used, but this did not reduce 

 any nitrate. Experiment with a known solution o. 5 per cent KNO3, 



