Ventilation as a dynamical problem : a paper read before the Annual Meeting of the Medical Officers of Schools Association, on February 6th, 1902 / by W.N. Shaw ; with the subsequent discussion.
- Shaw, Napier, 1854-1945.
- Date:
- 1902
Licence: In copyright
Credit: Ventilation as a dynamical problem : a paper read before the Annual Meeting of the Medical Officers of Schools Association, on February 6th, 1902 / by W.N. Shaw ; with the subsequent discussion. Source: Wellcome Collection.
Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.
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![twenty boys, yon have still something to think alx)iit in the matter of ventilation. VIII.—Details. With this mode of examining and tabulating ventilation retjuirements in view, I may now refer to a few points in regard to the different types of rooms that you have to deal with. For dormitories I must confess that the causes which make for the mixing of air are so many and so vigorous that from the point of view of effective isolation sejjarate rooms for the boys with separate inlets and outlets are unavoidable JcN/d/w/Zr/. This may be a counsel of perfection, and the advantages of isolation may have to go in consideration of other matters, but if not a separate room for each boy, then as few boys as possii)le in each room is a clear necessity. I should like to suggest an experiment in this matter for your consideration. Set your dormitory venti- lation at its best and light a })astille, or place some evil smel- ling comj)ouiid in the dormitory—the boys will suggest one if you are unable to do so—and ascertain whether your ventilation arrangements prevent the smell diffusing over the room. I will add a word as to closets ; it is usual to leave them cold and trust to open windows for their ventilation. They nearly always act as inlets to the adjoining buildings. The obvious plan is to make them the locus of vigorous extraction shafts, and as you remove certain waste i)roducts in one direc- tion remove the air in another. Let these outlets be fed by air from the i)assiiges so that the direction of flow is from the building to the outlets in the closets, and not the reverse. For some I’eason or other it has generally been regarded as neces- sary to put aj)paratus foi- extracting air into immediate con- nexion with the room to be ventilated. In consequence the room is apt to become the receptacle for all the specimens of air that have nowhere in jKirticular to go to, and the air which finds its way into closets is one of these specimens. The extraction ap})aratus might be (piiU' as effectively emi)k>yed for its ])urj)Ose if the closet formed the lower i)ortion of the extraction arrangement. In the ventilation of chai)els you have (juite an open field. I am acMpKiinted with one church which has a most amusing pro- vision for ventilation, 'fo the best of my recollection it con- sists of eight d-inch scpiare openings in the sills of the windows, four on t‘ach sid(*, communicating with ‘.f-inch air- bricks outside, several feet below. With an unusually strong wind, if the cliannels are not blocked with builders’ rubbish, one of these o})enings might deliver air for a single i)erson. In all, a congregation of four persons is provided for; but if anyone complains that a congregation of two hundred find it](https://iiif.wellcomecollection.org/image/b22449474_0014.jp2/full/800%2C/0/default.jpg)
