CHAPTER IL 



SYSTEMATIC SYNTHESIS OF PRINCIPLES INTO TISSUES. 



PROPERTIES. 

 Introductory Remarks. 



82. IT is VERY EASY TO DETERMINE the number and 

 characteristics of the thirteen Chemical Elements in the 

 Body, and of the Tissues into which the Elements are 

 compounded. 



83. IT is ALSO EASY TO CLASSIFY the influences under 

 which the compounding takes place : they are chemical, 

 vegetable, and animal, of which the first can operate 

 alone, and the first and second together ; or the second 

 in succession to the firsthand the first, second, and third 

 together ; or the third in succession to the first and sec- 

 ond together ; or the third in succession to the second, 

 it having acted in succession to the first ; so that the 

 first must always act before or when the second does, 

 and the first and second before or when the third does. 



84. IT is EQUALLY EASY TO CLASSIFY the compounds 

 of Elements in the Body, since they are, 1st, merely 

 chemical, and, with the exception of Water and Carbonic 

 Acid, contain some of the Elements of the third and 

 fourth groups, and are useful merely in the passive hard 

 tissues and in the liquids ; 2d, the Calorific or Oleaginous, 

 or non-Nitrogenous compounds of the Elements of the 

 last group, united under chemical and vegetable influ- 

 ences ; 3d, the albuminous, nutritious, nitrogenous com- 

 pounds of the first group of Elements, and two or all 



82. What ? 88. What? How can they operate? 84. What ? What 

 are they ? Name the thirteen elements in groups. 



