844 THE r6le of nitrogen, ETC., II. 



by tannin, is equivalent to 45^> of the total nitrogen of the seeds* 

 Throughout this paper the term " non-protein nitrogen" is used? 

 to signify only that part of the total nitrogen which is not 

 thrown down by the protein-precipitants used. 



As previously stated, I have not been able, in the limited 

 range of literature here available, to find any record of the non- 

 protein nitrogen in ripe seeds exceeding 12J&. Acacia pycnantha 

 with 45^o, therefore, stands out prominently as perhaps the 

 highest yet found; and the high values obtained in the first 

 series of experiments with thirty seeds materially alter our views 

 with regard to the form in which the nitrogen of seeds exists. 



In conclusion, I wish to express my best thanks to Professor 

 Anderson Stuart for the use of his laboratory with every facility 

 for my work, and to Dr. H. G. Chapman for many kind 



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Frankfurt — Landw. Versuehs-Stat. xlvii., 1895, 451. 



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