Animal Causes. 211 



engaged material and electric energy disperse through 

 the animal by like-polar repulsion, or like-central-re- 

 pulsion. Reproduction is automatic, mechanical, and 

 chemical ; for material combination only happens 

 when the compound contains the dual elements — 

 metallic and non-metallic. Again, even as combina- 

 tion in simple chemical compounds only occurs in 

 definite proportions,, or according to the combining 

 weights of the elements, so the nature of the com- 

 bined animal constituents, as well as the result of re- 

 production, is determined, as in plants, solely by the 

 combining formula of the type-cell. Hence when 

 this combination or cyst ruptures, the duality of the 

 compound manifests itself in the duality of the seg- 

 ments ; for males and females in all low forms are 

 virtually complete animals broken in two, and only 

 needing to be re-united or their sexual substances 

 again blended in order to complete the cycle, or 

 normal life-processes of the animal's existence. 



Over twenty thousand different species of protozoa 

 are known, but they probably number hundreds of 

 thousands. As the earth contains infinite room for 

 such minute organisms, as the automatic motions of 

 matter are illimitable in variation and complexity, as 

 the lowest protozoic life is a mere chemical existence, 

 and as generation must automatically ensue whenever 

 conditions are favourable, we may warrantably assume 

 that there is a daily entrance and exit of millions of 

 ultra-microscopic protozoa into the world, even as 

 millions of crystals spontaneously sprout on a frosty 



