APP. l] 



RESULTS. 



315 



The aqueous extract always contains some proteicls soluble 

 in water and may contain a small amount of peptones and 

 albumoses, but these substances are often absent, or present 

 only in traces. 



Considerable quantities of amides will be found. Traces 

 of ammonia, nitrates, and nitrites sometimes occur, but com- 

 monly these compounds are absent. 



Quantitative. 



The following values were obtained in a set of experiments 

 with seeds and shoots of Onobrychis. 



The p.c. are calculated for air-dried material in each case. 



Proteids insoluble in water 



Proteids soluble ,, 



Peptones and Albumoses 



Amides 



Ammonia ") 



Nitrates and Nitrites/ 



Ammonia. Nitrates, etc. (p. 260). 

 Experiment No. 1 



nil 



nil 



nil p.c. 



Ammonia 



Nitrates 



Nitrites 



Normal shoots, 

 trace 

 nil 

 nil 



Shoots kept in 



the dark and 



absence of 



oxygen. 



2-8 

 nil 

 nil 



Shoots from plants 



watered with 



ammonium 



nitrate. 



1-3 p.c. 

 1-7 p.c. 

 0-8 p.c. 



CHAPTER XI. p. 265. Oils and Fats. 



Qualitative. 



If a portion of the oil from Lepidium seeds is qualitatively 

 examined it will be found that the whole of the oil is not 



