Report of committee on sanitation of the School committee . ubic ft per Cubic ft per Hour to ^e. floor. Floor. Hour. eacli Pupil. 1 63 58 77 74 136,116 2,347 2 59 54 69 69 139,968 2,592 3 59 54 70 69 147,900 2,739 4 63 58 70 69 91,140 1,570 5 59 54 70 69 101,430 1,878 6 63 47 70 69 137,760 2,909 At a later date an inspection was made of the principalschool buildings in Lynn by Rufus K. Wade, Chief of theMassachusetts District Police, accompanied by three ofthe Inspectors. This ventilation system received the most searching in-vestigation. The results of the observations in a singleroom will an
Report of committee on sanitation of the School committee . ubic ft per Cubic ft per Hour to ^e. floor. Floor. Hour. eacli Pupil. 1 63 58 77 74 136,116 2,347 2 59 54 69 69 139,968 2,592 3 59 54 70 69 147,900 2,739 4 63 58 70 69 91,140 1,570 5 59 54 70 69 101,430 1,878 6 63 47 70 69 137,760 2,909 At a later date an inspection was made of the principalschool buildings in Lynn by Rufus K. Wade, Chief of theMassachusetts District Police, accompanied by three ofthe Inspectors. This ventilation system received the most searching in-vestigation. The results of the observations in a singleroom will answer for all. Room No. 1, Centre StreetSchool, Lynn, Mass., A. M., Jan. 12,1891. Temperatureoutside, 40^. Humidity of air, saturation, (just after a longrain,) wind northeast and velocity barely in room, middle of floor, 69^^, four feet fromfloor, 71^. These temperatures were the same at differentparts of room at desks. Temperature against partitionwall three feet from floor, 70^. Incoming air over jacket SCHOOL COMMITTEE. 16. FIG. VII.—RED ROCK SCHOOL. 16 ANNUAL REPOKT OF THE stove seven feet above floor, 75^; outgoing air at ventil-ator, 71*^. No appreciable heat radiated from jacketsaround stoves. No observable motion of air in of pupils healthy; eyes bright; no tendencyto irritation and disorder. Ventilation 3,060 cubic feetper hour to each pupil. The dampers were wide open in order to obtain a meas-ure of the full capacity of the system at the time. Underordinary conditions, fair ventilation is secured when thedampers are half way open. The fact that a larger amount of air entered the buildingthrough the ventilating flues at the dates of the later ob-servations is explained mainly by the fact that the weatherwas colder. In warm weather the movement is slower,and some air is usually allowed to enter in other ways. Tests with a Wolperts air-tester, made by Mr. Samuel at the inspection, December 9, indicated that the airo
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