Air and Health
General Books, 2009 - 190 pages
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1909 Excerpt: ... Dish exposed on chair on ground. "Richmond" Ward. Eight persons in room, some moving about. 4.20 p.m. Temperature 16 C. Dish exposed on chair set on bed. Total Num-ber Found in 10 L1tres. Total Number Falling per Cubic Foot per Minute. These figures are very instructive, and it will be noticed, among other things, that the micro-organisms are fewer in air at a height, and that they are increased in number when people are crowded together, or when they move about in enclosed spaces. The relationship between height and number is well established. Dr. Jean Binot did not find a single microbe in 100 litres of outside air, taken at the summit of Mont Blanc; and he found a progressive decrease in the number of microbes as the height increased. Thus he found--At Montanvert... 49 At the Mer de Glace 23 At the Place de l'Aiguille... 14 At the Grand Malet 8 At the Grand Plateau 6 On the Summit o Again, Graham Smith found at the top of the Clock Tower of the Houses of Parliament in London only one-third of the number at ground-level. In 1887 Carnelly, Haldane, and Anderson made some very important analyses of samples of indoor air. Their investigation, reported in the Transactions of the Royal Society, 1887, is full of interesting results, but here we can give only a few of their figures. Perhaps the most interesting analyses they made were the analyses of the air in artisans' bedrooms between 12.30 a.m. and 4.30 a.m. These analyses showed that bacteria increased as cubic space diminished. The following table gives a synopsis of their results: --The air of schools was also investigated with the following results: --Schools. With reference to their examination of school air they write: "When we come to consider that the children who attend average Board s...
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