Personal Hygiene

Personal Hygiene

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1907 edition. Excerpt: more intercostal; the heart beats somewhat more slowly; the muscles are relaxed; less blood flows through the brain and more through the skin. "It is sometimes stated that the digestive secretions are diminished during sleep, but the statement does not seem to rest on satisfactory observation, and may be doubted." "On the whole, however, the physiological activities of the body go on much as in waking conditions." (Howell.) It is chiefly the brain which sleeps. Most people require eight hours of sleep, others nine, although for some seven hours seems to be sufficient. It is said that women need an hour longer sleep than men, but that probably depends upon the individual and habit. The depth of unconsciousness increases to between the first and second hour of sleep, and then gradually diminishes, although towards morning it increases slightly again. Sleep is more sound in a darkened room, and when there is quiet. Sleep is not nearly so deep during restlessness. To have the greatest effect. sleep should all be taken at one time; several periods equaling eight hours do not give nearly as-much recuperative effect as the same period at one time. If one is constantly disturbed during the night more sleep is required. The question of naps depends upon the general health and conditions. Those subjected to great nervous strain, or those who are weak are much benefited by a brief nap, but people in robust health should have a nervous system sufficiently strong to make naps unnecessary. The nervous system is strengthened through use, just as the muscles are trained by exercise and the stomach by eating food (in moderation) that requires strong digestive power. If one is under special strain, a brief nap gives refreshment...
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Product details

  • Paperback | 54 pages
  • 189 x 246 x 3mm | 113g
  • United States
  • English
  • black & white illustrations
  • 123677261X
  • 9781236772619