466 
NAKAMURA ; ON THE RELATIVE VALUE OF 
Average height, March 
I2th 
Asparagine 
cm. 
20.27 
Ammonium succinate 
cm. 
19.92 
y y y y y y 
2 ith 
22 .6 o 
20.33 
Difference 
2.33 
O.4I 
Percentage of increase 
II.49 
2.O6 
In the next experiment, the solutions contained only one- 
fifth as much asparagine and ammonium succinate as before, all 
other conditions being the same. The result was after 14 days 
as follows : 
Asparagine 
Ammonium succinate 
cm. 
cm. 
Average height, March 23th 
21.31 
21.06 
,, ,, April 6th 
28.13 
24.08 
Difference 
6.82 
3.02 
Percentage of increase 
32.00 
14-34 
In the third experiment, onion 
plants were 
treated with the 
same solutions as in the first experiment, five plants being placed 
in each of the solutions, after all the side leaves had been cut off. 
Although in this case the central leaves in both solutions reached 
the same height, there was, nevertheless, a great difference in 
the number and length of the newly developed branches. (,) 
PLANTS IN ASPARAGINE. 
(i) The leaves kept in ammonium succinate solution commenced to show yellow 
colouration on the seventh day. 
