CENTRIFUGAL MO VEMENTS. 1 1 1 



probability be demonstrable by more perfect glasses. But 

 there is reason to think that in any case we must fail to see 

 the actual particles, which are the seat of change, in con- 

 sequence of their extreme tenuity and transparency. There 

 must, indeed, be centres more central than the most remote 

 spots which can be rendered evident to the senses, and it 

 is not possible to conceive an actual centre. The most 

 minute molecule must be compound to its very centre, and 

 yet the resolution of complex matter into their elements 

 must take place, and the re-arrangement of these in a new 

 manner must occur in the central part of every molecule 

 of which every mass of living matters consists. The 

 further consideration of this question is of the deepest 

 interest ; but the inquiry assumes a too purely speculative 

 character for me to pursue it here, as I am anxious not to 

 diverge very far from the consideration of matters which 

 may be investigated by observation and experiment. It 

 seems, however, to me probable that the wonderful changes 

 occurring when inanimate matter becomes living, which 

 occur in living beings alone, take place in the central part 

 of the spherical particles of germinal matter only. Dis- 

 cussions as to the nature of the vital forces must, I think, 

 therefore be confined to the consideration of the changes 

 which take place in those minute living spherules of which 

 there is reason to believe we can only see some which are 

 comparatively of large size, and probably many series re- 

 moved from their ultimate spherical components. 



Centri f ugal Movement of Living Particles. Movement 

 takes place in the most minute living particles in a direc- 

 tion from centre to circumference, while the inanimate matter 



