Identifier: journalofophthal2319amer (find matches)
Title: Journal of ophthalmology, otology and laryngology
Year: 1917 (1910s)
Authors: American Homoeopathic, Ophthalmological, Otological, and Laryngological Society
Subjects: Ophthalmology Otolaryngology
Publisher: New York : A.L. Chatterton & Co.
Contributing Library: The College of Physicians of Philadelphia Historical Medical Library
Digitizing Sponsor: The College of Physicians of Philadelphia and the National Endowment for the Humanities

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thers. At the time I ad-tributed it to increased humidity in the room, but this was before anytests had been made. On more than one occasion I have entered the room and foundpupils and teacher absorbed in the work of the hour quite unconsciousof temperatures sometimes as low as 570 F. Such temperatures arenever encouraged, and when found more heat was promptly admitted,but the experience is quite unique, as anyone who has noted schoolroom temperatures will grant. The reverse condition is the rule, aharassed teacher trying to prod her somnolent pupils up to their tasksat temperatures approximating 8o° F. Finding the screens so satisfactory in use from general observa-tion I wished to learn more about them, their effect on humidity,temperature, etc. Increased moisture in the air is one of the strong points made byadvocates of this method of ventilation. In order to learn whether the air in Room A actually contained agreater amount of moisture than other rooms under observation, and 3i8
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Value of Cloth Window Screens in School Rooms. if so, how much, two hygrometers were obtained. These instrumentsoperating on the evaporation principle were made by Huddleston, ofBoston, and are thoroughly reliable. They were placed as nearly aspossible in identical positions in the rooms under observation, suppliedwith new wicks and filled with distilled water which was renewed daily.Moreover, the instruments were changed daily, one replacing the other,in order to eliminate the possibility of error on account of any possibleslight discrepancy between the readings of the two instruments. Roomdoors were kept closed during the test. The result is shown in the accompanying chart. The upper por-tion gives temperature only, the lower portion humidity. Both RoomB and Room C are compared with Room A in order to make sure thatthe differences are not due to local conditions. The number and extent of the variations in humidity strike oneat once in looking at the chart, but what causes these vari

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