1 86 Clifford . — Notes on Myxomycete Plasmodium. 
unanswered ; Stahl’s explanation, to the effect that it has 
found this a convenient way of reaching the surface when 
aroused by warmth and moisture, seeming inadequate to 
account for the facts, and no other than this has as yet 
been proposed. 
Concerning thermotropism; it is found that the plasmodium 
will live in an atmosphere ranging from — 2 ° to 52°-53° C., 
and that it remains positively thermotropic up to 33°-34°C., 
but becomes negatively so above that point. In both sets 
of experiments we find additional evidence of the universally 
observed, but unexplained, sensitiveness of naked protoplasm, 
coupled with a remarkable power to protect itself when placed 
in unfavourable conditions. 
