6 CONTENTS. 



4. Object of Eating. All Parts of Body formed out of Blood 



Composition of Blood and Flesh. Atoms of Body enjoy short 

 Life, and are removed. Absorbents 110 



5. Nutrients and Absorbents, active in Laborer, who needs more 



Food. Wens and Swellings 113 



6. Young and Active have new Atoms of Flesh. Old and Inactive 



have old Atoms. Unerring Precision of Nutrition 117 



PART III. 



RESPIRATION. 



1. Wasted Particles carried out of the Body. Composition of Blood 



in right Side of the Heart. Chest. Ribs. Spine 120 



2. Movement of Ribs. Diaphragm. Inspiration. Expiration. 



Size of expanded and contracted Chest 123 



3. Lungs. Organ of Voice. Air-Vessels. Coughing. Respi- 



ration 127 



4. Waste Particles. Carbon. Air. Oxygen. Nitrogen. Car- 



bonic Acid. Blood absorbs Oxygen from Air and gives Car- 

 bonic Acid 132 



5. Venous changed to arterial Blood. Oxygen consumed, and Car- 



bonic Acid and other Matter given out, in Respiration. Of- 

 fensive Breath 135 



6. Respired Air unfit to be breathed again. Air should have full 



Proportion of Oxygen. Air loaded with Carbonic Acid or 

 Water can take no iore from Lungs 138 



7. More Oxygen consumecl, and Carbonic Acid given out in cold, 



than warm Air ; by strong and cheerful than by consumptive 

 and melancholy Persons 141 



8. Lungs must have Room to breathe 1 14 



9. Natural Shape of Chest most beautiful. Corresponds to Size of 



Body 147 



10. Frequency of Respiration. Size of Chest and Quantity of Air in- 



haled, correspond to the Waste to be carried away ^ 150 



11. Quantity of Air spoiled by Loss of Oxygen, by Carbonic Acid Gas, 



and Vapor of Lungs and of Skin 152 



12. Want of fresh Air in Houses, Parlors, Sleeping-Rooms, Cabins.. 154 



13. Foul Air in Workshops, Churches, Public Halls and School- 



houses. Ventilation 157 



14. Connection between Fulness of Life and Respiration 162 



15. Breathing foul Air creates Weariness, depreciates Life, impairs 



Constitution. Drowning. Consumption . . 165 



16. Privation of Air. Supply of Air for all Animals. Plants give 



Oxygen, and consume Carbonic Acid Gas li>8 



PART IV. 



ANIMAL HEAT. 



1. Animal Heat not changed by Temperature of surrounding Matter. 



Blagden's Experiments 171 



2 Animal Heat generated within. Warm and cold blooded Ani- 



mals. Animal Heat connected with Respiration 174 



3 Latent and sensible Heat. Internal Combustion 177 



4. Animal Heat increased by Exercise. Dependent on good Air 



and Food. Well-fed warmer than ill-fed. Effects of Diet 

 and Alcohol on internal Heat. .............................. 18Q 



