ust that of the wind on a kite; and vents priming, and in condensing engines it effects a great the equivalent of the string must be provided or the bird saving. by excluding the air from the boiler and cylinder, will be carried away, just as the kite is when the string two thus preserving the… … therefore, represents no less than 18 X 28 steamships in.the course of construction. = 364 cubic feet of air, while its entire The extractor, as shown in the engrav WASS’ displacement is probably at most 4 cubic ing, consists of a vessel of suitable dimen- feet. An increase in dimensions of one-…
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