492 



U. SUZUKI. 



whole day in solutions containing o.l% KHgPOi. o.i% K2HPO4. 

 0.1% MgSOi half saturated with gypsum/'^ 



They were kept in perfect darkness from the 7th to the 20th., 

 the temperature during this time being Min. 7°C. and Max. 2i°C. 

 The solutions were renewed every day, and no bacterial turbidity 

 was allowed to appear. The plants were very healthy and their 

 average height at the end of the experiment was 28 cm. After 

 careful washing and drying, they were analyzed, with the following 

 result : 



IN 100 PARTS OF DRY MATTER. 





Plants dried 

 on the 7th 

 [^) 



Plants kept 

 in CaSO^ 

 7th-2oth 

 (b) 



Plants kept 

 in NaN03 

 and CaSO^ 

 7th-2oth 

 (c) 



Plants kept 

 in suger 



and CaSO^ 

 7th-20th 

 (d) 



Plants kept 

 in sugar, 

 NaNO 



and CaSO^ 

 7th-20th 



Total nitrogen 



3.88 



4-13 



4.22 



3-75 



4-30 



Albuminoid nitrogen 



2.03 



1.85 



1.85 



1.76 



2.40 



Asparagine nitrogen 



0.68 



1.62 



1.26 



1. 12 



0.96 



Nitrates nitro'^en 



0 



0 



0.32 



0 



O.IO 



Other nitrogen 



1.17 



0.66 



0.79 



0.87 



0.84 



Proteids (Alb. Nx 6.25) 



12.69 



11.56 



11.56 



11.00 



15.00 



Asparagine (water free) 



3.21 



7.64 



S-94 



5.28 



4-53 



IN 100 PARTS OF TOTAL NITROGEN. 





(a) 





(c) 



(d) 



(e) 





100.0 



100.0 



1 00.0 



100.0 



100.0 



Albuminoid nitrogen 



52.3 



44-8 



44.0 



47 -o 



55.8 



Asparagine nitrogen 



1-75 



39-2 



30.0 



30.0 



22.3 



Nitrates nitrogen 



0 



0 



8.0 



0 



2.4 



Other nitrogen 



30.2 



16.0 



iS.o 



23.0 



1 9-5 



(l) The separation of solutions was necessary to prevent bacterial growth as far as 

 possible. 



