8 CONTENTS. 



t 



15 Effect of great Efforts. Proper Exercise of Children and Youth. 302 



16. Laborer needs healthy Organs of Digestion, Nutrition, Res- 



piration, and Skin. Connection of Exercise with Brain. , .... 304 



17. Effect of Hope and Confidence, Doubt and Fear, Cheerfulness 



and Melancholy, of Passion and Alcohol, on Strength 307 



18. Attitudes. Spine, supported by Muscles, very strong. Porters. 



Pedlers. Burdens on Head. Spine erect. Centre of 

 Gravity over Line of Support 309 



19. Erect Attitude best for Walking ; for Labor ; for Mechanics ; 



Farmers. Spine curved from side to side ; Bent by stooping. 



Students, Writers have curved Spine ; and Girls more than 

 Boys 315 



20. Time for Labor. Experiments. Sleep, Time for ; Effect of 



Loss. Disturbed by difficult Digestion 321 



PART VII. 



BRAIN AND NERVOUS SYSTEM. 



1. Brain. Nervous System. Spinal Cord. Nerves 325 



2. Brain connected with all Parts by Nerves; receives Impressions 



through them. Sensations in Brain. If Nerve is cut, Sensa- 

 tion and Power cease 330 



3. If Nerve is touched or diseased, Sensation is excited in the Brain. 333 



4. Pain in amputated Limbs. Voluntary and involuntary Motion. 336 



5. All Organs and Functions impaired when Brain is impaired. 



Brain not sensitive; subject to Growth and Decay; has large 

 Supply of Blood; fatigued with Labor 340 



6. Day the Time for mental 'Labor. Brain gains Power by Exer- 



cise ; weakened by Over- Action ; connected with other Organs 



Effect of Alcohol 344 



7. Brain Seat of Mind and Affections. Power of Mind limited by 



Power of Brain. Mind impaired by Indigestion, Hunger, Ex- 

 cess of Food. Cheerfulness favors 'Respiration, Digestion, and 

 muscular Action 349 



8. Brain sustains physical and mental Actions. Mind works best 



when Body is easy. Uncomfortable Sensations interrupt 

 Study 353 



9. Mental Action interrupted by moral Feelings, Anxiety, Fear. 



Proper and improper Motives for Study 357 



10. Various mental Bowers affected by Education. Precocious Chil- 



dren. Effect of Study on Health. 111 Health of literary Men. 361 



11. Inequality of Powers ; affected by Education 364 



12. Habitual Actions easy. Perfect Education. Concentration of 



Mind. Vacations 368 



13. If Inequality of Powers be disregarded, Mind may be deranged. 



Insanity from Misuse of Mind, Dyspepsia, Cold, Over- 

 Action 373 



14. Insanity from misdirected Education, religious Anxiety, per- 



verse Habits 375 



15. Day-Dreaming, Passion, Intoxication, Fright may cause Insanity. 



Various Grades of mental Health. Sound Mind in sound 

 Body 377 



16. Eye. Composition. Tumors. Pupil. Effect of Light. 



Tears.... 380 



17- Near-sightedness. Spectacles. Far-sightedness. Diseases of 



the Eye. Use and Care of the Eye 385 



18. Ear. Structure. Hearing. Deafness 387 



C inclusion 391 



