442 
SUZUKI ; 
Hence i c,c - of the ammonium chloride solution contains 0.0398 
gram nitrogen. 
15 e - 0, of the ammonium chloride solution contains 0.5963 gram 
nitrogen. 
II. Nitrogen determination of the ammonium chloride solu¬ 
tion that had remained unabsorbed, (after experiment). Total 
unabsorbed solution were filled up to 500 c,c *, from which 20 c,c> 
and 30 c - c ‘ were distilled as above. 
1. 20 c ‘ c ‘ yielded 0.0220 gram nitrogen ( = 23.3 C,C - baryta 
solution) = 0.1,% nitrogen. 
2. 3o c - c - yielded 0.0330 gram nitrogen ( = 34-9 c,c ' baryta 
solution) =0.1% nitrogen, 
which, calculated to the original solution, give 
i- 3-67% 
2. 3.66^. Average 3 6?% nitrogen. 
Therefore, total nitrogen remained unabsorbed = 0.5501 gram. 
Total nitrogen originally applied =0.5963 gram. 
Total nitrogen absorbed =0.0462 gram. 
III. Nitrogen determination of sodium nitrate solution ap¬ 
plied to the plant (before experiment.) 
io cc - 0 f the sodium nitrate solution were diluted up to ioo c,c *, 
from which each io c-c> were taken for analysis. 
1. io c,c> yielded 0.0150 gram nitrogen (temp. 6 °C., pressure 
29.84 inches ; NO = 24.5 c - c> ). 
= 1.50^ or 15.0^ of original solution. 
2. io c,c - yielded 0.0150 gram nitrogen (temp. 6.°C., pressure 
29.84 inches ; NO = 24.5 C-C -). 
Hence 30 c-c> of the sodium nitrate solution contain 0.4497 
gram nitrogen. 
VI. Determination of unabsorbed nitrogen in the sodium 
nitrate solution. 
Total unabsorbed solution were concentrated to iooo c,c - from 
which 50 c,c - were analyzed. 
1. 5o c - c - yielded 0.0203 grams nitrogen (temp. I4.5°C., pres¬ 
sure 30.18 inches ; NO = 33.8 C,C - ). 
2. 50 cc - yielded 0.0203 grams nitrogen (temp. I4.5°C., pres¬ 
sure 30.18 inches ; NO = 33.8 c,c> ). 
Total nitrogen remained unabsorbed = 0.4060 gram. 
Total nitrogen originally applied =0.4497 gram. 
Therefore, total nitrogen absorbed by plants = 0.0437 gram. 
