Journal of the Franklin Institute; devoted to science and the mechanic arts (1826)
Franklin Institute (Philadelphia, Pa.) · Oxford, Eng. [etc.] Pergamon Press [etc.] · leaf 226
on of an improved Compound Blow-pipe andits appendages. The following figure represents a compound blow-pipe which Icontrived and executed myself, about eleven years ago; but, fearingit might be deemed unnecessarily complex, I did not then publish anaccount of it. Experience has shown, that the… … B, is a brass ball with a verticalperforation, terminating in a malescrew above, and in a female screwbelow. Another perforation, atright angles to this, causes a com-munication with the tube t, whichenters the ball at right angles.A similar, but smaller brass ball,may be observed above, with…
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