ON WARMING AND VENTILATION. 331 



5. The means of causing the draughts is perfectly simple, it is merely 

 necessary to have a grate at the bottom of the chimney for the 

 escape of the air. 



The volume of air to be renewed in places requiring to be purified 

 may be fixed as follows : 



HOSPITALS : 



Per hour and per individual. 

 M.C. 



Ordinary cases 60 to 70 



Wounded persons 100 



Women lying-in 100 



At times of epidemics ,. 150 



PRISONS 50 



WORKSHOPS, ordinary 60 



unhealthy 100 



BARRACKS, by day 30 



by night 40 to 50 



THEATRES, MUSIC-HALLS, &c 40 



LONG GATHERINGS, MEETINGS 60 



SHORT 30 



INFANT SCHOOLS 12 to 15 



ADULT -. 25 to 30 



STABLES, &c. 180 to 200 



These figures agree with those of English, American, and German 

 hygienists. 



With regard to temperature, the necessary results to be obtained by 

 warming apparatus are the following : 



TEMPERATURE. 



DAY-NURSERIES, for babies I5c 



ASYLUMS, SCHOOLS 15 



HOSPITALS, ordinary 16 to i8o c 



for the wounded ... ... ... ... 12 



WORKSHOPS, BARRACKS 15* 



PRISONS 15 



THEATRES, MUSIC-HALLS, c 19 to 20" 



GATHERINGS, MEETINGS, &c 19 to 20 



