FOUNDATIONS 9 



Fig. 38 is copied de Bary's instance of a rotatory movement 

 replacing the alternate currents in a mycetozoan plasmodium. 



In a subsequent chapter an account is given of a streaming 

 or circulation of protoplasm in the bodies peculiar to the 

 disease molluscum contagiosum. 



This streaming may last for several days and may be 

 accompanied by the presence of bud-like protrusions and of 

 separate minute spheres with a similar streaming. Apart 

 from other evidences in molluscum bodies this streaming is 

 a strong witness to life : and it is a phenomenon any one 

 who may have the material can reproduce. 



Besides such movements of protoplasm of a cell there 

 are currents in channels or linear vacuoles : watching a 

 large fungus hypha growing in a slide-and-cover culture I 

 have seen in minute parallel channels steady currents pass 

 some in the direction of growth, others the opposite way ; 

 one such hypha was undivided when first seen, later septa 

 were formed, but these did not appear to affect the circula- 

 tion. 



By fixing root-tips in a mixture of neutral formalin 

 (10 c.c.), K 2 Cr0 4 (2-5 g.), HgCl 2 (5 g.), H 2 (90 c.c.), Bensley 

 demonstrated the channels he named canaliculi, the presence 

 of which is an indication that intracellular circulation of 

 liquids exists. In mitosis the centrosomes and the two 

 spindle poles have been found to be alike electrically, and, 

 if so, they cannot represent an ordinary electromagnetic 

 field. The filament that connects a nucleus and the 



