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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. (en) |
