142 GENERAL ANALYSIS. 



spondingly reproduced, in order to preserve its perfect 

 state for action. 



557. ONE OF THE MOST REMARKABLE AND INTEREST- 

 ING PROPERTIES OF TISSUE is its power of self-growth, 

 or of reproducing itself. 



558. TIME is one of the elements required for per- 

 fect reproduction ; for if the Tissue is decomposed before 

 sufficient time has been allowed for its perfect formation, 

 the result is incomplete and pernicious. 



559. IT MIGHT AT FIRST THOUGHT BE SUPPOSED that 



as the decomposing Tissue necessarily contains all the 

 components of Tissue, it would only be necessary for the 

 Tissue to re-form itself from them. 



560. IT MUST BE CONSIDERED, however, that if the 

 Tissue could reproduce itself from its decomposed sub- 

 stances, just as much power would be required for re- 

 composition as had been obtained by decomposition ; so 

 that nothing would be gained. 



561. IT WOULD BE A GREAT FALLACY tO SUppOSC that 



power can be exhibited without it has first been obtained 

 from some source, and without the destruction of a cor- 

 responding amount of substance. 



562. THE TISSUES, THEREFORE, MUST BE SUPPLIED 

 with and form themselves from components that are 

 themselves indefinite compounds, possessing (or, so to 

 speak, storehouses of) the power exhibited when the Tis- 

 sues decompose. 



563. THE SELF-PRODUCING PROPERTY OF TISSUES is 

 LIMITED to forming themselves from components pre- 

 viously compounded and previously prepared. 



564. SINCE THE POWER TO BE EXHIBITED BY THE 

 TISSUES cannot be produced in the Body without an equal 

 expenditure of power, it must be condensed or stored in 

 the components of Tissue by the action of plants, from 

 which all food is directly or indirectly obtained. 



667. What Is ? 658. What said of ? 5T9. What ? 660. What ? 

 Ml. What ? 562. With what - ? 66a How - ? 564. What effect ? 



