FORMATION OF ASPARAGINIC IN PLANTS. 



413 



Time of experiments (duration). Sept. 19th — Oct. 8th. 

 Beginning of germination. Sept. 24th. 



Solution applied. Oct. 2nd— Oct. 8th. 



Temperature in the glass house : — 



Min. ifC. ; Max. 44°C. 



Average height of control plants. 



,, ,, the plant in ammonium nitrate. 

 ,, ,, the plant in sodium nitrate. 



Average fresh weight of a control plant. 



,, ,, ,, the plant in ammonium 



nitrate. 



,, ,, ,, ,, the plant in sodium 



nitrate. 1. 18 gram. 



Ammonium nitrate solution applied. 5o8'' c - = 0. 178 gram. 



Sodium ,, ,, ,, 6o8 ee - =0.201 gram. 



Table V : — In 100 parts of dry matter (free from ash). 



riants treated with ; 



g gc.n,. 

 IO j jcm. 



953 an>. 



1.07 gram. 

 1. 13 gram. 



Albuminoid nitrogen 

 Proteids 



Asparagine nitrogen 

 Asparagine 



Control plants 

 2.82 

 17.64 

 1-65 

 7-77 



Ammonium nitrate 

 2.99 

 18.66 

 2.57 

 12.10 



Sodium nitrate 



19.44 



2-33 

 10.98 



V. Experiments with potato plants (Solanum tuberosum). 

 Well developed potato plants were taken from the field, and 

 placed in the following solutions : — 



0.1 



0.2' 



solution of ammonium nitrate, 

 solution of sodium nitrate. 



b, 



c, distilled water. 



The plants were kept in a glass house. 



Time of experiments. Oct. 12th — Oct. 21th. 



Temperature :— Min. i6°C. ; Max. 40°C. 



At the end of the experiment, the plants began to suffer, 

 and a portion of the roots commenced to decay. Of course, all 

 the unhealthy parts were removed ; only the lower portion of the 

 stem 10-15°'™' in length served for analysis. No ammonia was 

 found either in the original plants or in the other three cases, but 



(2) In the second experiments with squash, the plants were also attached l>y a 

 fungus; hence I could not continue the experiment. 



