Researches in the Theory and Calculus of Operations. 333 



The main features of the internal economy of the animal 

 system being assured by the establishment of the nutrient 

 and sentient schemes, it only remains shortly to say that 

 with respectively responding internal forces of the indi- 

 vidual body, external homogeneous forces will unite in 

 forming their appropriate nodal membranous boundary. 

 The external aural vibrations encounter the similar force 

 existent as a component within the sensitive body con- 

 sidered, and the result finally appears in the shaping of 

 nascent tissues into the complicated but harmonious organs 

 of hearing (anglice the ear), with its drum (tympanum) and 

 mallet, its piano-like scale as keyboard with cortian fibres 

 as keys and nerves as vibrating musical strings (Huxley). 

 Similarly the force imprinted by light is one of the com- 

 ponent forces of the living body ; with which, the conspi- 

 ration of the external luminiferous forces necessarily tend 

 to the formation of a status of equilibrated or harmonious 

 action ; whence the conversion of nascent tissue into the 

 organ of seeing {anglice the eye), with its pupil and lens, its 

 rods and cones, etc. The application of similar reasoning to 

 show the creation of the organ of smelling is too easy to 

 detain us. 



Spontaneous generation was possible once, and but once, 

 in the creation of the progenitor of a particular race or 

 species of creatures. The cooperation or conspiration of 

 internal and external forces first settled into the construc- 

 tion or genesis of a particular form of individual activity, 

 the highest physical achievement of which activity culmi- 

 nated in the concentration of all its con\ponent forces in 

 the form of a quasi-molecular or atomic germ, egg or seed 

 (Prevost, Draper, Agassiz). In the primitive womb of 

 Nature, masculinity and femininity were formed by mag- 

 netic subdivision of positive and negative polarity as here- 

 tofore stated ; and in all after genesis, where sexuality ex- 



