Being informed, while this Book was printing, that it was said that M.D. F.R.S. had long since made a like Proposal, for sweetning the Air of Ships, … - Stephen Hales

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Being informed, while this Book was printing, that it was said that M.D. F.R.S. had long since made a like Proposal, for sweetning the Air of Ships, in a Treatise called Aëro-Chalinos, or a Register for the Air, printed in the Year 1677... In which Book is the following Proposal, viz. In order to have the Benefit of Change of Air, to another Country or Climate, almost at any Season, and that without going out of the House; he would have a Room, which he calls an Air-Chamber, to be built... Air-tight every where; with a very large Pair of Organ-Bellows to be placed in the Room; to or from which, Air is to be conveyed through the Wall, by a Copper Pipe; with Valves to open inward or outward as Occasion shall require. With these Bellows, the Air in the Room is either to be condensed and made heavier, by forcing Air in, or lighter, by conveying Air out of the Room.

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About Stephen Hales

(September 17, 1677- January 4, 1761) was an English clergyman whose inventions, studies and experiments made major contributions to developments in botany, and in both plant and animal . He was the first to measure utilizing his "Hales Manometer", and also invented a to distill various "airs" i.e., gases. His other medical or health related inventions include a ventillation bellow to improve air quality in enclosed spaces, and surgical for the removal of s. He was a philanthropist and wrote a popular tract on alcoholic intemperance.

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Additional quotes by Stephen Hales

He proposes also to prevent Sea-Sickness thereby, by having a Man thus shut up in a close Cabin in a compressed Air: This, I suppose, has led some to say, that this and my Proposal are the same. But bow wide is their Difference! My Ventilators are intended to promote a free Perspiration and Breathing, by conveying great Quantities of fresh Air into Ships, in exchange for very bad Air. On the contrary, Dr. Henshaw's Conetrivance would make a good Air, by confining it, very bad, and thereby retard Perspiration, and incommode the Breathing, and so cause, instead of preventing, Sickness... Besides, the Make of my Ventilators is very different from that of Organ-Bellows.

A Translation of which ingenious Treatise, was communicated to me by Dr. Mortimer; in which he says, "In Hospitals and Barracks for the Sick, this Machine is placed in the , from whence two or three Pipes go down, some Inches thro' the Ceiling, into each Room where the Sick lie; and thus draw out all the unwholesome Air and Stench, which does more harm than any Physick can repair. And at the same time, has this accidental Benefit, That those who begin to mend, may give themselves a proper Exercise, in working the Machine: Only they ought to take care to keep all the Garret-Windows open, while the Machine is a going. In Men of War and Hospital-Ships, this Machine is placed on the upper Deck, directly over the great other Hatch: And then the Pipe, which goes down between the Decks, draws out the unwholesome Air; which is instantly supplied by fresh.

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As these Ventilators are like to prove of great Benefit to Mankind, in many other Respects than are here mentioned, or can as yet be thought of; so it will be of great use, if those who shall have made farther Improvements, will... communicate them; as also an Account of the Difficulties or Success they have met with in putting the Things here proposed in execution.

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