This is a Print on Demand title. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. Product details Format Hardback | 466 pages Dimensions 156 x 234 x 25mm | 826g Publication date
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. 1895 Excerpt: ...is working well and sufficiently will produce a near equality of temperature in all parts of the room. The difference between the temperature at the floor level and that at five feet from the floor should not exceed 5 degrees. A system is efficient in proportion as it maintains its activity under widely varying outside temperatures. Ventilation is needed at 40 degrees as much as at zero, but it is much harder to keep up a sufficient action in the former case. If the system is based on the draught of heated flues, some additional means for increasing the heat of the flues ought to be available for such mild weather. The relative humidity of air commonly breathed in our winter climate is low, compared with that in Western Europe. It becomes of necessity still lower when warmed. It is not, however, proved that the dryness thus obtained is generally prejudicial to health, either in schools or hospitals, although some individuals appear to require greater moisture. A part, if not the whole, of the unpleasant effect of breathing superheated air is due to the bad ventilation, and the excessive temperature. The thermometer placed at five feet from the floor should mark an average of G5 degrees to 70 degrees in our climate. This is considerably higher than is found desirable in Western Europe. It is to be presumed that the entering air is warmer than that which leaves the room, since it contributes a fraction of its heat for the warming of the walls and windows. If introduced at the upper part of the room, it will therefore fall towards the flood by degrees as it becomes cooled. Hence, a level near the floor is a natural one for its exit. The proporSchool Hygiene. tion of CO, at the upper level of the room is not essentially different, on the average, from that in t...
Product details
- Paperback
- 189 x 246 x 3mm | 132g
- 01 Mar 2012
- Rarebooksclub.com
- Miami Fl, United States
- English
- black & white illustrations
- 1130079996
- 9781130079999
Download Report of the State Board of Health of Wisconsin 189394 (9781130079999).pdf, available at pasmae.org for free.
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