IN HYGIENIC PHYSIOLOGY. 163 



12. What part of the body needs the loosest clothing ? 



The abdomen ; because of the delicate organs within, un- 

 protected by a bony covering. 



13. What part needs the warmest ? 



The feet, because they are furthest from the center of heat 

 and motion, and most exposed to cold and wet : and the neck 

 and shoulders, since here are located the delicate organs of 

 voice and respiration. 



14. Why is a 6i spare bed 99 generally iinhealthful ? 



Because it is apt to be damp and unventilated. 



15. Is tit ere any good in sighing ? 



(See Physiology, p. 82.) 

 It probably brings up the "arrears" of respiration. 



10. Should a hat be thoroughly ventilated? Hotv? 



1. Certainly, as the heated, foul air is injurious. 2. Several 

 openings should be made on the sides near the band. A 

 single hole at the top is quite insufficient for ventilation. 



1 7. Why do the lungs of people who live in cities become 

 of a gray color ? 



Probably because of the deposition of carbonaceous particles 

 which penetrate the substance of the tissues. The coloring is 

 permanent, like tattooing, where India-ink is pricked beneath 

 the skin. 



18. Hoiv would tfbu convince a person that a bedroom 

 should be aired ? 



Take him from the fresh, pure, invigorating out-door at- 

 mosphere into the close, depressing air of the bedroom, when 

 first vacated in the morning, and his sense of smell will satisfy 

 him of the need of ventilation. 



19. IVTiat persons are tnost liable to catarrh 9 consump- 



w, etc. ? 



(See Physiology, p. 85.) 



The victims of lung-starvation. 



