| C.N. Douglas, comp. Forty Thousand Quotations: Prose and Poetical. 1917. | | | | Ventilation |
| | | You cannot breathe too much of the open air. Dr. Abernethy. | 1 |
| Be careful never to retire to rest in a room not properly ventilated. Horace Mann. | 2 |
| There is nothing that this age, from whatever standpoint we survey it, needs more, physically, intellectually, and morally, than thorough ventilation. Ruskin. | 3 | | |
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