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air chamber Annual Report arrangement asthenopia astigmatism blackboard Board of Health boys brain breathing carbonic acid cause ceiling cent Chairman check valves child close danger death desk diphtheria disinfection duct dust examination exercise eyes favorable five floor flues foul air four fresh air furnace German measles girls gymnastic headache Health for 1890 Health Officer heater heating height hypermetropia inches increased infectious diseases infectious diseases reported inlet instruction light lungs Mary Putnam Jacobi measles Members mental method muscles muscular myopia nearsighted needed nuisance was removed nuisances were removed observed physical culture physician pipe placed prevalent pupils recess sanitary says scarlet fever scholars school buildings school children school-house school-room scrofula seat Secretary and Health session side smoke pipe stove surface teacher teaching temperature tion traoe typhoid fever ventilation walls wardrobes warm air whooping cough writing