144 (fENERAL ANALYSIS. 



570. SECRETION is at the same time both a produc- 

 tive and a destructive process. The substance produced 

 is obtained by the expenditure of power, and that, as 

 said before, is produced by destruction or decomposition 

 of substance. 



571. BY SECRETION the power that was in one form 

 will appear in another. It is a transformation of power. 

 By secretion, power is, so to speak, wrought up and con- 

 densed into higher capabilities, and made to serve more 

 exalted purposes. 



572. ALL THE TISSUES ARE THEREFORE SUBSIDIARY 

 to two, muscular and nervous ; and therefore the whole 

 Body is constructed with a view to the production of 

 those two Tissues and the appropriate exhibition of their 

 properties. 



573. MUSCULAR CONTRACTION AND NERVOUS EXCITA- 

 TION are the two grand properties that distinguish ani- 

 mal from vegetable life, and to them it is subservient. 



574. VEGETABLE LIFE REACHES up into animal life, 

 is the basis of it, and blends with it. The former may 

 exist without the latter, but the latter cannot without 

 the former. 



575. Inf. Food should be selected with reference 

 to its adaptability to nourish the two Tissues, as it is not 

 supposable that two Tissues so different can be equally 

 well nourished by the same kind of aliment. 



576. Inf. Not only must the right elementary sub- 

 stances be used for food, but they must also be properly 

 compounded before they are eaten. 



577. IT CANNOT TRUTHFULLY BE SAID that we un- 

 derstand all the steps in the production of Tissue or the 

 precise number of them. They are numerous, and sub- 

 stances assume various forms from the time they are first 

 drawn in by the plant till they appear as perfect tissue ; 

 much time and power are also consumed in the produc- 



C70. What - ? 571. What effected ? 572. To what - ? 578. What said - ? 

 574 What said of ? 575. How select Food ? 576. What to be eaten ? 577. What ? 



