File:Physiology, hygiene and sanitation, an elementary textbook of physiology, with special attention given to hygiene and sanitation (1919) (14578508350).jpg

Identifier: physiologyhygien00heiz (find matches)
Title: Physiology, hygiene and sanitation, an elementary textbook of physiology, with special attention given to hygiene and sanitation
Year: 1919 (1910s)
Authors: Heizer, W. L. (W. Lucien), b. 1880
Subjects: Physiology Hygiene Sanitation
Publisher: Louisville, Ky., C.T. Dearing Printing Co., Incorporated
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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Fig. 125.—Showing natural directionof the big toe. (Feet of an unshodsavagre.) 246 PHYSIOLOGY, HYGIENE AND SANITATION will be the guides for the number and kind of baths onemay need. Clothing. The skin alone, in cold climates and thosesubject to sudden changes in weather, can not keep thebody heat at an even temperature. Clothing is neededto protect the body from injuries, insects, bacteria, andto keep the body heat regulated by preventing too muchor too rapid loss of the body heat. Clothing does notwarm anybody. It simply prevents the escape of heat from the body.In cold weatherthe cloth shouldbe loosely wovenso that the airspaces betweenthe threads willprevent heatfrom passingthrough. Mostof our clothingis made fromthe hairs of ani-mals (woolencloths andfurs) or fibersfrom plantsthe web of a
Text Appearing After Image:
Fig-. 126.—An X-ray picture of feet in shoes.A. Showing- crowding of bones in a shoe tootight across the toes. B. Showing the properarrangement of the bones in a well-fittedshoe. C. Eyelets for lacing shoe. D. WTierebunions often form. (cotton or linen) or silk which iscaterpillar. Woolen cloth is best for winter wear because heat doesnot pass through the many openings between its threads,or as it is sometimes said, it is a poor conductor of heat.Two layers of thin clothing are often warmer than onelayer of thick clothing because of the layer of non-con- HYGIENE OF THE SKIN 247 ducting air between them. Newspapers folded over thechest under the coat are often used by travelers to keepthem warm. The papers make several layers of airthrough which the heat from the body has difficulty inescaping. When clothing becomes wet, the air spaces are filledwith water instead of air, and it then permits the bodyheat to escape, and the body becomes chilled. It is forthis reason that the body shou

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