10 



Causes of continued life without food in disease Changes 

 from slow starvation and age. 



Time changes our identity while it spares our individuality. 



Change of particles most rapid in youth Why Hastened 

 by exercise Effects of too much exercise Youth and 

 exercise increase the demand for food Cause of prema- 

 ture old age and decrepitude in over-wrought operatives 

 The arrest of the secretives ultimately produces death 

 Why. 



LECTURE IV. 



Recapitulation, with further Remarks on the Various Steps 

 in the Process of Assimilation. 



Every organ has its own mode of life, and its own shield or 

 envelope Nutritive fluid does not penetrate the substance 

 of the organs Hence every organ performs all the steps 

 of the process of assimilation, like the entire animal, ex- 

 cept respiration Of which, also, it is capable if properly 

 located. 

 Constant alternation of the particles from the solid to the 



fluid state, and the contrary. 



Remarks on the nutritive fluid Its simplicity in simple ani- 

 mals and plants Coagulation of blood Its various parts 

 Globules of blood Globules of sap. 

 Definition of a living body. 



Variety of results from the single cause Lifenot more 



remarkable than those from Gravitation. 

 Take leave of the vegetable kingdom. 



Diffusion of life in animals. 



Injuries of any important part affect the health of the whole 

 body But some parts easily spared Cutting grape vines 

 to increase fruit Anecdote of an amputation of the wrong 

 limb Complex animals die if deprived of the head or 

 heart Girdled trees. 



Power of healing wounds inversely as the complexity of 

 an animal Earth worm Cooking frogs Dog and turtle's 

 head The shark. 



