PHYSIOLOGICAL KNOWLEDGE OF THE TEA PLANT. 20T 



Theine nitrogen. 3.2 3.6 



Nitrogen in other forms. 57.9 58.3 



Every 100 seedlings contain 0.046. g theine. 



(2) Seedlings grown in day light. 



Average length of stem 10 cm, average length of roots 

 10 cm, 3-4 leaves opened, the largest leaves 3 cm in length and 

 2.5 cm in width. Number of seedlings 235. Dry weight of 

 seedlings (free from cotyledons) = 20.44 g. (Dry weight of 100 

 seedlings = 9.i grams). Dry weight of cotyledons = 7i.2 (Dry 

 weight of cotyledons of IOO seedlings = 3l.6 gram?) 





(") 



(i) 





Seedlings free from 







cotyledons. 



Cotyledons. 



In 100 parts of dry matter. 







Total nitrogen. 



3-38 



1-47 



Albuminoid nitrogen. 



I.78 



0.79 



Theine 'nitrogen. 



0.174 



0.013 



Nitrogen in other forms. 



1-43 



0.67 



(Theine). 



0.66 



0.05 



In 100 parts of total nitrogen. 







Total nitrogen. 



100.0 



100.0 



Albuminoid nitrogen. 



52-7 



53-7 



Theine nitrogen. 



5- 2 



0.9 



Nitrogen in other forms. 



42.1 



454 



Every 100 seedlings contain. 







Total nitrogen. 



0.307 



0.465 



Albuminoid nitrogen. 



0.161 



0.250 



Theine nitrogen. 



0.158 



0.0041 



Nitrogen in other forms. 



0.130 



0.2 1 1 



In another experiment the effect of sodium nitrate was 

 tested. 



(3) Seedlings were kept in darkness until they reached 10-15 

 cm and afterwards exposed to day light for 16 days keeping 

 them in half saturated gypsum solution. 



Control seedlings : (a) Number of seedlings 200. Dry 

 weight of leaves 4.11 g. Dry weight of leaves of 100 seedlings^ 

 2.06 g. Dry weight of stems and roots 23.5 g. Dry weight of 

 stems and roots of 100 seedlings = 1 1.8 g. Nitrate seedlings (b) 

 were watered with a 0.2% sodium nitrate and half saturated with 

 gypsum. Number of seedlings 340. Dry weight of leaves 6.50 g. 

 (Dry weight of leaves of IOO shoots=i.c)i g). Dry weight of 



(*) This agrees essentially with the observations of Clautriau : Nature et Signifi- 

 cation des Alcaloides Veg^taux Brussels 1900. p. 79- 



