408 : BOTANICAL GAZETTE (stay 
case sufficient hydrogen peroxide to make the concentration 0.1. per 
cent. Results were similar in the two cases. In from one-half to ten 
minutes the oxidation products appeared in the form of minute dark 
granules exhibiting slow Brownian motion and distributed throughout 
TABLE I 
OXIDATION OF VARIOUS COMPOUNDS BY HYDROGEN PEROXIDE WHEN ACTI- 
VATED BY JUICE EXPRESSED FROM LIVING ALGAE: (++) INDICATES A POSITIVE REACTION 
IN TEN MINUTES OR LESS; (—) INDICATES NO REACTION EVEN AFTER SOME HOURS 
OR ONE TOO FAINT TO BE CONSIDERED TRUSTWORTHY. 
ony 
r co 
8 
se 
o ad 
Hae 
El 6 | ss|8 
3 5 Bol] Es 
Ubi iyers 
*8/ 3 | s5| te g 
2 | 2 |e] 8 |s2|f5 3 
Sla|2|S1ee! 2 Be ee) 3\% 
Siaia)4/82|8 (88188! s ee 
9 % 8 s ae oe aa ag a) t=) E | 
B18 181s lael s |28188) 8121818) 3 
6/H&}/ He /<|2 | ale [sf |a le jalael a 
Blue-green 
Oscillaria sp...); — | —|/— | +i} +/]+/+/+4+/]- —-|- 
reen 
Conferva sp.... kd Ti ae a ee ae ae ad — 
Spirogyra sp...| — |faintifaint| — | +] +/+ /]+]+)])—-]-|-|7 
UIE 8D. ec in + +* +* +) +/+} + {faint} — 
.Enteromorpha 
Beto Sea ees - - — a +) + a mes + — _ ‘- 
Chaetophora sp.| — | —|/—}—/+/+/+/+/+/1-[-i- 
Vaucheriasp....-— | —| —{|—/|}+)+/+)4/+ a ae Le 
Chata S60 oc. 3 Ee ert eg ee ec a ne ees al | 
rown 
Laminaria sac- 
CHARA oo. Ss at tn oe ee ee ee ee a es 
Fucus sp... .. . —j— pm fe tte ttt ty eI 
Ascophyllum 
nodosum...... we een ee ee ee 
e 
Chondrus cris- . 
Pus. eee Pe |e PK Pel Rt Rl Pe POP 
Polysiphonia sp.| — | — | —|—i +i +/—-/;-—-[-|-1-!- 
* Reaction with and without hydrogen peroxide. 
the protoplasm. The size of the granules varied slightly in different 
species, but in all cases granules were found only in the protoplasm, 
never in the vacuole. In Vaucheria (and occasionally in Spirogyra) 
_ they showed a tendency to aggregate about the nuclei, though never 
about the chromatophores. In cells which had been boiled, howevet» 
