8 Introduction. 



9. The integument. 



10. The cerebro-spinal membrane. 



This last membrane in many of its details is singular, and 

 remarkably complicated ; but it is identified in its highest 

 function to be metamorphized muscle, and the adoption of 

 this view was in MS. long before the same had been 

 surmised by Fromman and Grandry, and also by Mitchell, 

 of America. 



Displacement of membrane is remarkably frequent, as 

 well as differentiation of tissue. 



Again, the special senses are recognised as seven, and 

 each of these senses has a special tripartite membrane placed 

 under, or subject to, its guidance and service. Thus the 

 loco-motive membrane has distributed to it the sense of 

 force or weight. The sense of touch has the integument 

 placed at its disposal, and so on. 



The three senses, smell, sight, and hearing, are viewed as 

 wonderful mechanical expedients for inverting or abridging 

 limbs, by which beautiful contrivances material is saved, 

 whilst extension is greatly increased. 



On the other hand, certain suggestions are thrown out in 

 relation to the vegetable kingdom outside the field of true 

 vegetable morphology, but only as it were to unite in one, 

 the principles of mechanism and general laws, which govern 

 both the animal and vegetable kingdoms, and moreover in 

 some measure to suggest some points of practical utility in 

 relation to the solidity of wood as indicated by the leaf. 



