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Freethought Review, Volume I, Issue 10, 1 July 1884, Page 12

A paper on the ventilation of theatres was lately read at the Parker Museum of Hygiene, London. In some crowded theatres, the air has been said by a competent authority to be more foul than that oi the street sewers. The intensely heated air would seem to act like a pump, and to draw up the vitiated atmosphere from the drains below the building. The introduction of electric lighting to some of the metropolitan theatres has done much to mitigate the evil ; but the ventilation of public buildings docs not receive the attention which its importance demands.