ANDREWS: PROTOPLASMIC STREAMING IN Mucor 
469 
that while the protoplasm flowed 15 minutes longer toward the tip 
than to the base of the hyphae, the velocity of the apical stream 
TABLE II 
EXPERIMENT WITH Mucor stolonifer GROWN IN IO PER CENT GELATIN AT CONSTANT 
TEMPERATURE AND EXPOSED TO DRY AND MOIST AIR ALTERNATELY 
bei ae 
Order of 
streaming 
First 
Direction | Time of | Time of mane, ‘ 
fetes — pa wierd streaming ‘ excel bn amy ye 
to tip Io min, fast, then com- 20 C. 
ow pressed 
to base 7 min.! fast, then m- aa C. 
slow pressed 
to tip 12 min. slow com- 24° C. 
pressed 
to base 3 min. | fast com- 24° C. 
pressed 
to tip 5 min. fast com- 24° C, 
press 
to base 4 min. | fast com- aa?'C: 
pressed 
to tip 8 min. slow com- 24° C. 
pressed 
to base 2 min./| fast com- = Yigg, Os 
pressed 
to tip II min. slow com- 24° C. 
pressed 
to base I min. | slow, then om- 20: C. 
stop pressed 
with jerk 
to tip 43 min. slow com- 24° C. 
pr 
to base 153 min. | slow com- 24°C. 
pressed 
to tip 14 min. slow com- 24° C. 
pressed 
to base 3 min. | slow m- aa” C, 
pressed 
to tip 19 min slow m- 24° C. 
pressed 
to base 303 min. | slow com- 24°C. 
pressed i. 
to ti i slow com- 24 Lv. 
Dp 60 min raed : 
to base 70 min. | slow com- 24° C. 
pressed 
Total Total 
143} min. |136} min. [ 
Was also much greater at first than the basal flow. The amount 
a Protoplasm, therefore, carried in either direction over a given 
ce varied considerably during more than 1% hours, during 
Which time the observations of this experiment were continued. 
