APP. l] 



RESULTS. 



297 



The aqueous extract always contains some proteids 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. 



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. 



Ammonia. NiPrates, etc. 

 Experiment No. 4 



Ammonia 



Nitrates 

 Nitrites 



Xormal shoots, 

 trace 

 nil 

 nil 



5 



Shoots kept in 



the dark and 



absence of 



oxygen. 



2-8 

 nil 

 nil 



Shoots from plants 

 watered with am- 

 monium nitrate. 



1-3 p.c. 

 1-7 p.c. 

 0-8 p.c. 



Chapter XI. p. 243. OUs and Fats. 

 Qualitative. 



If a portion of the oil from Cress seeds is qualitatively 

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



