16 



BIOLOGY FOR BEGINNERS 



A person weighing 154 pounds would be composed of; 



Oxygen 97.2 pounds 



Carbon 31.1 " 

 Hydrogen 15.2 



Nitrogen 3.8 " 

 Calcium 3.8 



Phosphorus 1.75 " 



Sulphur .27 " 



Chlorine .25 " 



Fluorine .22 " 



Potassium .18 " 



Sodium .16 " 



Magnesium .11 " 



Iron .01 " 



Oxygon 97.2 



Carbon 31.1 



Hydrogen 

 15.2 



Nitro- 

 gen 

 3.8 



a Iron .01 

 D Magnesium .11 

 D Sodium .16 

 D Potassium .18 

 D Fluorine .22 

 Chlorine .25 



Phosphorui 

 1.75 



Calcium 

 3.8 



FIG. 2. Elements composing a human body weighing 154 pounds. (Figures 

 express pounds.) 



COLLATERAL READING 



See index of any text book in Elementary Chemistry. Applied Biology, 

 Bigelow, pp. 5-9; Elementary Biology, Peabody and Hunt, pp. 5-13; 

 Essentials of Biology, Hunter, pp. 17-25. 



