XIV CONTENTS 



Induced currents Electroplating Electromagnets Electric 

 light and heat Storage batteries Practical exercises. 



CHAPTER XXXI. LIVING THINGS 211 



Organic and inorganic bodies Cells Growth Food making 

 Digestion Respiration Reproduction Species and higher 

 groups Scientific names Distribution Plant and animal 

 forms Practical exercises. 



CHAPTER XXXII. EVOLUTION 223 



Origin of living things Change in nature Organic evolution 

 Variation in nature The struggle for existence The Muta- 

 tion Theory Elementary species Plant and animal breeding 

 Practical exercise. 



CHAPTER XXXIII. BACTEKIA 231 



Nature of bacteria Helpful and harmful species Toxins and 

 ptomaines Antitoxins Disinfectants and antiseptics Prac- 

 tical exercises. 



CHAPTER XXXIV. THE FRAMEWORK OF THE BODY 237 



The skeleton -Arrangement of the skeleton Joints Muscles 

 tendons, and ligaments Value of exercise Breaks, sprains, 

 and deformities Practical exercises. 



CHAPTER XXXV. THE GOVERNOR OF THE BODY 245 



Need of a governor The brain The spinal cord Involuntary 

 action Reflex action Pain and the nerves Sleep Practical 

 exercises. 



CHAPTER XXVI. THE NOURISHMENT OF THE BODY 250 



The need of food Value of foods The digestive system 

 Structure of the alimentary canal Digestive juices The 

 teeth Practical exercises. 



CHAPTER XXVII. THE TRANSPORTING SYSTEM OF THE BODY. . 259 

 The blood Absorption Functions of the blood The heart 

 Circulation of the blood Regulation of the blood stream 

 Bleeding Practical exercises. 



CHAPTER XXVIII. THE VENTILATING SYSTEM OF THE BODY. . 268 

 Respiration Organs of breathing Breathing Ventilation 

 The voice Colds Expression of the feelings Practical exer- 

 cises. 



CHAPTER XXXIX. THE COVERING OF THE BODY 275 



The skin Structure of the epidermis The dermis Out- 

 growths of the skin Glands of the skin Functions of the per- 

 spiration Care of the skin Practical exercises. 



