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Show As to Sneezing. Why should a person sncezo? Why does almost every ono bellovo that to sneczo is to catch cold? Sneezing Is an oxploslvo expulsion ot air through the nasal passages jind mouth; but what causes It and what aro Its results? It Increases tho circulation. It clears the head. When you sneczo always hold your head straight In front. Don't twist It to tho left or right. Novor sneeze over your shoulder. You nre llablo to burst n blood vossol. Somo say that sitting lu a draft will causo sneezing. In former days It was a very pollto custom to tako snuff to encourngo n sneeze. Men had their bojewelcd snuff boxos and carried their handkerchiefs In their cuffs. No doubt a snoQzo was originally designed to expel Irritating materials from the upper air passages. In tho act a powerful expiratory effort is mado, the vocal cords aro kept shut tllj tho preg-sure preg-sure In the chest, hns risen high, and" air Is then suddenly allowed to escape upward, bolng directed Into tho back of tho noso by tho soft palate, |