SYSTEMATIC SYNTHESIS OF TISSUES. 165 



of the second, united under chemical and vegetable in- 

 fluences, and brought to the highest condition by animal 

 influences. In addition to these compounds, the simple 

 Element, oxygen, of the first group, and iron, may be 

 mentioned as necessary in the Body. 



85. SUMMARY or CHEMICAL COMPOUNDS AND PROX- 

 IMATE PRINCIPLES IN THE BODY : 



C Hydrochloric Acid. 



Silica. 



J Carbonate of Lime, Soda, and Potassa. 

 L p hos p hate of Lime, Magnesia, Soda, and Potassa. 



Chloride of Sodium and Potassium. 

 [ Water. 



( Gum { 



2d, CALORIFIC ] Sugar. 3d, ALBUMINOUS J 



I Fat " Casein. 



4th, EXCRETORY-* 



Carbonic Acid. 



Urea. 



Bilin verdin. 5th, SIMPLE ELEMENTS j Oxygen. 



Cholesterine. used in the Body \ Iron. 



Lactic acid. 



Creatin, &c. 



86. IT is VERY DIFFICULT, on the other hand, to de- 

 termine by what precise steps the thirteen simple Ele- 

 ments are compounded into the six Tissues. 



87. AN EGG THROWS a flood of light on this intri- 

 cate subject, since the contents of the shell are com- 

 pounded into all the tissues. 



88. THE MEAT OF AN EGG is COMPOSED of one form 

 of Albumen, called egg-albumen, compounded of the 

 Elements of the first and second groups ; a portion of 

 calorific fat, compounded of the Elements of the second 

 group ; and the chemical compounds, including elements 

 of the third and fourth groups, and combined more or 

 less intimately with the albumen and fatty matter. 



89. IT is THEREFORE CERTAIN of what all the tissues 

 can be composed, and through what form the Elements 



85. Give . Write table. 86. What ? 87. What said of ? 88. Of what ? 



6"9. What is ? 



