Xll CONTENTS. 



CHAPTER XVI. FURNITURE, AND ITS USES. CON- 

 TINUED. 



Purifying the Blood. The Lungs. Capacity of the 

 Lungs. Breathing. Uses of Breathing. Nature of 

 the Air. Breathing Air twice. Of Ventilation. Free 

 Motion of the Lungs. Tight Lacing 226239 



CHAPTER XVII. TEMPERATURE OF APARTMENTS. 

 Curious Question. Variations of Temperature. . . . 240 246 



