348 
Mottier . — The Effect of 
segregated into two or more rounded portions, displaying 
a rapid rotating movement within. This segregation of the 
living contents is similar to certain phenomena of disorganiza- 
tion brought about by other external stimuli such as the 
action of electrical currents, &c. (Klemm ’95). 
Again, whenever the displacement in the internodal cells 
was transverse instead of longitudinal, the displaced contents 
lay in a stationary band-shaped mass extending the entire 
length of the cell, while the colourless protoplasm enclosing 
the central vacuole kept up a constant rotation. 
In both Chara and Nitella the centrifugal force almost 
always inhibited the movement of the protoplasm, which 
returned immediately the action ceased unless death ensued. 
In Nitella displacement was less difficult. In every cell of 
the part of the plant used, the chlorophyll with the nuclei and 
other inclusions were crowded into a dense mass in the lower 
end of the cell ; but this sort of treatment proved too severe 
for Nitella , for every cell died before the chlorophyll began 
to distribute itself. If the centrifugal force were allowed 
to act only long enough to produce a partial displacement, 
the cells seemed uninjured, and the chloroplasts were soon 
redistributed. 
Vaucheria. 
From what has been said in the preceding pages in regard 
to the several plants mentioned, we know, a priori , about 
what to expect from a similar treatment of a majority of all 
plants. 
In Vaucheria the presence of oil-bodies adds a new factor 
to our problem, and it is in this respect that this plant offers 
anything additional to what has thus far been considered. 
Centrifugal action of about one hour and a half was 
sufficient to drive nearly all or a vast majority of the 
chloroplasts into the ends of the filaments. (Pieces varying 
in length from one-half to one centimetre were used.) Those 
chloroplasts which remained behind seemed to be smaller and 
