onishing freshness and comfort rence Hargrave, of Sydney, N. S. W. It is propelledby an engine fed with compressed air, and, as will beseen from the engraving, which is from Engineering,the machine is a marvel of lightness and ingenuity. The compressed air is stored in a tube which formsthe… … piston is made of vulcanite, with a leather cup ring forpacking. The wings are made of paper, and have no canting orfeathering motion other than that due to the spring-ing of the material of which they are made. Theweight of the wings is 3 oz. To find how much thewings deflected, one was held by…
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