Card on- Assimilation of Marine Algae . 671 
Experiment I. January 12, 1900. 1 per cent. NaCl 
in distilled water. 
Date. 
Days. 
Amount of Starch. 
Jan. 1 3 
1 
little 1 
Jan. 17 
5 
moderate 
Experiment II. January 13, 1900. 1 per cent. NaCl 
+ 1 per cent. KN 0 3 in distilled water. 
Date. 
Days. 
Amount of Starch. 
Jan. 16 
3 
none 
Jan. 18 
5 
the slightest trace 
Experiments with different percentages of KN 0 3 in dis- 
tilled water gave the following results. For sake of com- 
parison, a similar series (except that 1*5 per cent, was used 
instead of 1 per cent.) of percentages of NaCl, made a week 
later, are also given. 
Experiment III. April 13, 1900. Ulva in distilled 
water containing 
Date. 
Days. 
o*i % KNO z . 
0.5 % KNO z . 
1 % KNO z . 
Apr. 14 
1 
a trace 
a trace 
a trace 
Apr. 16 
3 
a trace 
a trace 
the slightest trace 
Apr. 19 
6 
a trace 
little 
the slightest trace 
Experiment IV. April 20, 1900. Ulva in distilled 
water containing 
Date. 
Days. 
o-i % NaCl. 
0.5 % NaCl. 
1.5 % NaCl. 
Apr. 21 
1 
a little 
a trace 
a little 
Apr. 23 
3 
moderate 
moderate 
moderate 
Apr. 26 
6 
large 
moderate 
large 
1 The scale of starch-accumulation used will be found fully explained in my 
former paper. 
