43« 



SUZUKI ; 



i gram of air dry sample of the plants in ammonium nitrate 

 yielded 



0.0019 gram nitrogen ( = 2.occ. baryta solution 0 ') = 0.19% nitrogen. 



1 gram of air dry sample of the plants in sodium nitrate yielded 

 0.0008 gram nitrogen ( = o.8cc. baryta solution 0 ') = 0.08% 

 nitrogen/ 2 ' 



BUCKWHEAT (II.) 



ASPARAGINE NITROGEN. 



Plants in 



Fresh sample 

 used in grams. 



Baryta water W 

 replaced in cc. 



Nitrogen found 

 in grams. 



Percentage of 

 nitrogen ( = | 

 asp. nitrogen.) 



Ammonium chloride... 



5° 



54 



0.005 1 



0 10 



Ammonium nitrate . . . 



So 



3-2 



0.0030 



0.06 



Sodium nitrate 



S.o 



1.6 



0.0015 



0.03 



Control plants 



5° 



1 4 



0.CO13 



0.03 



AMMON1ACAL NITROGEN. 



Plants in 



Fresh sample 



Baryta water 0; 



Nitrogen found 



Percentage of 



used in grams. 



replaced in cc. 



in grams. 



nitrogen.) 



Ammonium chloride... 



745 



6.0 



0.0057 



0.08 



Ammonium nitrate'... 



6.20 



2.7 



0.0026 



0.04 



(1) I cc. of the baryta solution = 0.0009447 gram nitrogen. 



(2) There are doubtless also traces of asparagine decomposed by calcium 

 hydrate at the ordinary temperature ; the small quantities of ammonia obtained from the 

 control plants and the plants in sodium nitrate seem to be due to this source. Control 

 test with Nessler's reagent (added to the cold extracts of the control plants and plants in 

 sodium nitrate) lead me to this inference. 



