APPENDIX 163 



NaOH 4- HOI NaCl -f H 2 O 



Sodium Hydroxide Hydrochloric acid Sodium Chloride Water 



One atom of soda (Na) looses a molecule composed 

 of an atom of and one of H, and is joined by an atom 

 of chlorine taken from a molecule of hydrochloric acid 

 whose hydrogen made the second atom of that element 

 necessary to form a molecule of water. 



It was never the writer's intention to compose a text- 

 book of chemistry and physics but to give a bare out- 

 line which would be of assistance to those students of 

 physiology who have not had a proper course in those 

 subjects. The student is, therefore, referred to regular 

 works for further enlightenment. 



