INTRODUCTION. 3 



be termed the Science of the Conversion of Man into 

 the Animal Kingdom, so may Physio-philosophy be 

 called the Science of the Conversion of Spirit into Nature. 



20. Physio-philosophy is divisible, therefore, into three 

 parts. The first of these treats of spirit and its acti- 

 vities ; the second, of the individual phenomena, or things 

 of the world ; the third, of the continuous operation of 

 spirit in the individual things. 



The first division is the doctrine of the Whole (de 

 Toto) Mathesis. 



The second, that of Singulars (de Entibus) Ontology. 



The third, that of the Whole in the Singulars (de Toto 

 in Entibus) Biology. 



21. The Science of the Whole must divide into two 

 doctrines; into that of immaterial totalities Pneuma- 

 togeny ; and into that of material totalities Hylogeny. 



Ontology teaches us the phenomenon of matter. The 

 first phenomenon of this are the heavenly bodies compre- 

 hended by Cosmogony ; these develop themselves further, 

 and divide into the elements Stochiogeny. 



Erom these elements the Earth element develops itself 

 still further, and divides into minerals Mineralogy ; 

 these minerals unite into one collective body, and this is 

 Geogeny. 



The Whole in Singulars is the living or Organic, which 

 again divides into plants and animals. 



Biology, therefore, divides into Organogeny, Phytosophy 

 and Zoosophy. 



After this division of the subject the question first of all arises, what is 

 science, provided there is one. 



TRUTH. 



22. Science is a series of necessarily inter-dependent 

 and consecutive propositions, which rest upon a certain 

 fundamental proposition. 



23. Now, if anything be certain it can only be one in 

 number. If, then, there be only one certainty, there can 

 also be only one science, from which all the rest must be 

 derived. 



