424 
SUZUKI ; 
It is seen from the above tables that the decrease of aspara¬ 
gine and the transformation of nitrates are enhanced when sugar 
is offered, and that on the other hand, an increase of albuminoid 
nitrogen takes place, as was to be expected. (1) 
X. Experiments with wheat ( Triticnm sativum). 
Young plants 6-io c,m high, were irrigated on the field with 
the following solutions :— 
a. o. i% solution of ammonium phosphate. 
b. 0 . 2 % ,, ,, sodium nitrate. 
Time of experiments :—24 days (Nov. 7th—Dec. ist). 
The temperature was sometimes very cold and fell to 
3°C. Total solutions added = about iooo 0,0, in both cases, (two 
times irrigated). Rainfall occurred three times during the 
experiments. 
Table XXII. In 100 parts of dry matter. 
Plants treated with 
^--;-;— 
Control plants Ammonium phosphate Sodium nitrate 
Asparagine nitrogen 0.32 0.42 0.47 
Asparagine 1.51 1.97 2.21 
Here no noticeable quantity of asparagine accumulated, 
very probably because all the conditions for a rapid formation of 
proteids were favourable. 
Second experiments with wheat. 
Young plants i5-20 c,n1, high, grown on the same farm, were 
carefully removed, washed, and cultured in the glass house in 
glass cylinders, containing :— 
a. 
5oo c,c - of 0.1% 
solution of urea. 
b. 
y y y y y y 
y y 
,, ammonium chloride. 
c. 
,, 0.05^ 
y y 
,, ammonium carbonate. 
d. 
,, „ 0.2% 
y y 
,, sodium nitrate. 
e. 
distilled water. 
Duration of experiment :—11 days (Feb. 3rd—14th). 
Temperature :—Min. 2°C. ; Max. 35°C. 
(1) Note on the assimilation of nitrates :—According to Treub the first product of 
assimilation of nitrates in the leaves of Pangium edtite, (a tree of Java), is prussic acid. 
(Cf. Chem. Zeitg. Feb. 1896). In my numerous experiments, however, on the assimila¬ 
tion of nitrates, the transformation of nitrates to ammonia, asparagine, or proteids, so 
quickly proceeded that it was impossible to discover any intermediate product between 
nitric acid and ammonia. 
