Ventilation : a text-book to the practice of the art of ventilating buildings ; with a supplementary chapter upon air testing / by William Paton Buchan.
- Buchan, William Paton
- Date:
- 1891
Licence: Public Domain Mark
Credit: Ventilation : a text-book to the practice of the art of ventilating buildings ; with a supplementary chapter upon air testing / by William Paton Buchan. Source: Wellcome Collection.
Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.
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![another instance by a paraffin light burning, ho found that in fifteen minutes the air in the middle of the chamber was raised 7° Fahr. by the presence of a man, and 9-5° in one hour, and when the temperature at starting- was 44°, in two hours it rose to 04 8 Fahr. With a paraffin lamp and the temperature at start 4'2-?u Fahr., in fifteen minutes it rose to 44°, in one hour to 4(3-3°, and in two hours to 47.3°. In these two eases there was no ventilation or change of air in the chamber. The man therefore gave off much more heat than the paraffin lamp. A man gave about double the amount of carbonic acid a sperm or paraffin candle did. Thus a man in an hour produced '6 of carbonic acid to 100 ft. of air, a candle -31. Extra heat relaxes the exertions of both body and mind, especially when the air is saturated with moisture.* When the temperature rises, and organic matter is pre- sent, it becomes more offensive with the extra heat. Places that may not feel offensive in frosty weather soon do so after a thaw has set in and the temperature rises if_ matter to cause offence exists. Putrefaction is facilitated greatly when the thermometer rises to o-r Fahr. _ Dr. Smith says :— It is not right to demand as much air for ventilation on a cold day as on a warm ; it is not right to break the windows of patients in winter, and to tell them that fresh air is better than heat.f The chemical action, and with it the feelings, demand warmth first above all things. It is the very first demand, as no function can go on without it. You may live hours, days, or years in badly ventilated places with more or less discomfort and danger ; t but a draught of cold air may kill like a sword almost instantly. In the railway carriage as well as in the house the great instinct . '. At 50 Fahr.—the temperate range—the body, if in motion, may tee] warm enough ; but seated, a. higher heat, such as 60°, may be more acceptable. Below 55 it may be difficult to keep up the animal heat without exercise or extra, clothing. t People should air their rooms well, however, at all times when not occupied. Like the dull-burning candle on page '-'•'!.](https://iiif.wellcomecollection.org/image/b21459824_0041.jp2/full/800%2C/0/default.jpg)
