468 ANDREWS: PROTOPLASMIC STREAMING IN Mucor 
of the room are alternated and the specimens are grown under 
constant temperature. In the first experiment the spores were 
grown in a 5 per cent solution of cane sugar. The tables (1 and 
11) will be self-explanatory with the exception of the first column, 
which indicates the number of times the saturated air and air of 
TABLE I 
EXPERIMENT WITH Mucor stolonifer GROWN IN 5 PER CENT SUGAR SOLUTION AT 
CONSTANT TEMPERATURE AND EXPOSED TO DRY AND MOIST AIR ALTERNATELY 
s Order Direction Time of Time of 
ac ; F Rate of State of | Tempera- 
Pa sea lesasslag rer ae Sade’ streaming vacuoles ture 
1 | First to tip 15 min. rapid Com- 24° C. 
pressed 
2| Next to base 20 min. |slow Com- a4’ C, 
pressed 
3 | Then to tip 8 min. slow, then Com- 24° C. 
aster pressed 
4| Then to base 7 min. |slow Com- 24° C. 
pressed 
5 hears comatose t —_—." “still for 3 min.| -Com- 24° C. 
pressed 
6 Next to tip 9 min. slow, then Com- 24° C. 
faster pressed : 
7 Then to base 4 min. |slow, then Com- 24° C. 
essed 
8 | Then to tip 7 min. slow, then om- 24° C. 
fast, then pressed 
stopped wi 
: jerk °C 
9 | Then to base 5 min. |slow Com- 24 L- 
Pp 
10 | Then to tip 8 min. slow, then Com- 24°C. 
fast pressed ee 
11 | Then to base 2} min. |slow Com- | 24 \ 
pressed z 
ee A i le for 2 Com- | 24°C 
minute pressed oC 
13 Next to tip 7 min. slow Com- 46" 
pressed a 
14 | Then to base 14 min. |slow Com- a al 
pr oC 
15 Then to tip I min. slow Com- 24 
pressed 
ai 
oO Total 
55 min. | 40 min. Po eee 
the room were alternated. The flow to the tip was caused when 
: d 
the dry air of the room was drawn through the gas chamber, a 
the flow from the tip when saturated air was admitted. a 
In this experiment the hyphae protruded from the sugar 0™ 
into the surrounding air of the gas chamber. It will be seen also 
