‘the space coloured red represents pure air under the most favourable circumstances of strong wind.. the blue indicates impure atmosphere’ (1854)
..#crossventilation keeps the air moving, so that stale air & viral particles are diluted & removed
..#crossventilation keeps the air moving, so that stale air & viral particles are diluted & removed
Upper: ‘the state of the atmosphere in a non-ventilated church, the windows & doors being closed & lamps lighted’
Lower: ‘the tower or spire is made to act as well for the introduction of fresh air as for removal of impure air, & for both purposes it affords superior facilities’
Lower: ‘the tower or spire is made to act as well for the introduction of fresh air as for removal of impure air, & for both purposes it affords superior facilities’
‘a sectional view of one of the largest & most modern of ‘Ward Schools’ in New York which will convey some idea of the child-packing followed in some of them.. originally intended for 1,000 into which 1,400 are suffered to be crammed without an attempt at systemic ventilation...
...building is 85 feet long (26m) by 45 wide (14m) & 60 high (18m).. so there would be 229,500 cubic feet of air, giving for each individual 164 feet which would be inhaled every 40 minutes or nine times the six school-hours’
‘health of the people is first object of legislation’
‘health of the people is first object of legislation’
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