ents were used in build- for ascertaining the diameter of a pipe, etc., having a sec- pin in eccentric to the half required throw—in drawing 3^ ing the pyramids; moreover, steel must have been employed tional area equal to that of two other pipes, or vice versd. inches;—screw the pin tight, slip on… … present day. The ac- to find the proper diameter for the latter pipe. Then from and all is ready. Now move the excentric hand so that the companying engraving represents a double pairof bellows, 5 on the scale of one of the divided edges to 4£ on the other, slide just peeps past the crank hand back…
Patents · Iron · Rays · Asks · Improved · Professor tyndall · Heat · Carbonic acid · Steam gage · Horse power · Trade catalogs · York steam · Years ago · Scientific American · Steam engine · Square inch
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