How to live : rules for healthful living based on modern science : authorized by and prepared in collaboration with the Hygiene Reference Board of the Life Extension Institute, Inc. . ct was more pronouncedin tests taken on non-smokers. 5. It was also noted that smoking was not conduciveto concentration upon the reading, which the men at-tempted during the tests. Bush,11 in a series of tests on each of 15men in several different psychic fields foundthe following conditions among smokingstudents immediately after the period of smok-ing was completed: 1. A 10J per cent, decrease in mental effici
How to live : rules for healthful living based on modern science : authorized by and prepared in collaboration with the Hygiene Reference Board of the Life Extension Institute, Inc. . ct was more pronouncedin tests taken on non-smokers. 5. It was also noted that smoking was not conduciveto concentration upon the reading, which the men at-tempted during the tests. Bush,11 in a series of tests on each of 15men in several different psychic fields foundthe following conditions among smokingstudents immediately after the period of smok-ing was completed: 1. A 10J per cent, decrease in mental efficiency. 2. The greatest actual loss was in the field of im-agery, 22 per cent. 3. The three greatest losses were in the fields ofimagery, perception and association. 4. The greatest loss, in these experiments, occurredwith cigarets. Bush ascribed these effects to pyridin,claiming that his experiments failed to revealnicotin in the tobacco smoke, except in a verysmall proportion in that of cigarets. Tests for nicotin in smoke are beset withmany difficulties and possible fallacies whichhave in the past misled investigators into ap-parently determining that tobacco smoke con- [260]. - Dr. W. F. Snow J 5.] NOTES ON TOBACCO tained no nicotin, but simply decompositionproducts. Pyridin is unquestionably present in to-bacco smoke, and is a poisonous substance, al-though less so than nicotin. It is not found,however, in chewing tobacco, and as theclinical effects of chewing tobacco are ap-parently identical with those of smoking to-bacco, very strong and universally acceptedchemical proof of the absence of nicotin fromtobacco smoke must be awaited before accept-ing such a conclusion. (See (4), (5), (6)in bibliography.) Cigaret smoking is a time waster; that is,it breaks up the power of attention, as fewsmokers are satisfied with one cigaret andthe mere physical act of lighting a freshcigaret disturbs the continuity of thoughtand work. Dr. W. J. Mayo 12 calls attentionto the fact that acco
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecthygiene, bookyear1915
