142 
BOTANICAL GAZETTE 
[FEBRUARY 
The action of the algal extract is very slow when compared with 
that of commercial diastase, as is shown in the preceding tables 
I-IV. To determine whether the action of the algal extract would 
TABLE II 
EXTRACTS FROM POLYSIPHONIA VARIEGATA 
? 
AFTER 12 HOURS 
AFTER 36 HOURS 
Amts. pi 
F es eth Boos 
Medium 
Medium 
Very 
marked 
ery 
marked 
AFTER 28 HOURS 
AMOUNTS OF VARIOUS oe = 
SOLUTIONS S. ppt. wi : 
lotie ake Fehling’s Pi tees olor 
ion 
ce. “spas pega wh 5 cc.) Tinge of 
Met PA ey. purple Slight Light purple 
a a aipal pea 5 ce i 
ATEN TONG oo ay cc Blue-purple | Small urple 
I cc. commercial diastase+5| Purple- 
ce. starch pastes. 20S, brown Marked Brown 
2 cc. commercial diastase+ 5 
ec. starch paste... 2... .5 Brown Marked Brown 
1 cc. distilled water+5 cc. 
star fee ea Blue None Blue 
2: ce, rps water+5 cc. 
BATCH DASE oo uae: Blue None Blue 
Control, 5 ot geen’ paste .| Blue None Blue 
2c. algal e extract. 4530 os, ONG 5 ja ee ee, 
2 cc, commercial diastase... .j... 0.5... .. Mean 5 7-:2 5 
TABLE III 
EXTRACTS FROM AGARDHIELLA TENERA 
AFTER 16 HOURS 
AMOUNTS OF VARIOUS 
SOLUTIONS . Amts. ppt. wit ‘ 
Ting solor_| SEingsou: | Tong cole 
1 cc. algal extract+5 cc. Tinge of 
starch paste; 0. 31a, e None purple 
2 cc. algal extract+5 cc.| Tinge of 
starch peske.. i665 554% purple Trace Blue-purple 
cc. commercial diastase+5| Purple- 
cc. starch paste ........ brown Medium Brown 
cc. commercial diastase 
cc, starch paste... 502. rown Medium Brown 
I sae ee water+5 cc. 
eae Blue None Blue 
2 pry ~ baie water+5 cc. 
st nee ice eee Blue None Blue 
Control, 5 cc. starch paste .| Blue None Blue 
2 Oc. WitBbOSIIAch 4) oe NOME Oe ee 
2 cc. commercial diastase...|............ Mechitny ioe gai oe. 
Amts. ppt. wi 
Febling $ a 
Trace 
Slight 
V 
