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Updated: May 22, 2025
A noteworthy instance of the use of pneumatic appliances in cylinder sinking for foundations is that in progress at the Forth Bridge. The wrought-iron cylinders are 70 feet in diameter at the cutting-edge, and have a taper of about 1 in 46. Shafts with air-locks and pipes for admitting water and ejecting silt are provided.
So the American business man has grasped his opportunities and used them and developed them and invented about them, thought them into lines of success, and thus has developed into a new business man, with a vigor and effectiveness and a cutting-edge that has never been equalled anywhere else.
A moveable frame was placed between the two bars, motion being given to it by a long cylindrical thread acting on any tool put into the sliding frame, and, consequently, causing the screw, by means of a handle at each end of it, to push or draw the point or cutting-edge of the tool either way. Mr. George Rennie's Preface to Buchanan's Practical Essays on Mill Work, 3rd Ed. xli.
It is a wonder it wasn't fractured. But Mr. Pike avers he has removed hundreds of teeth by this method and never known a fractured jaw. Also, he avers he once sailed with a skipper who shaved every Sunday morning and never touched a razor, nor any cutting-edge, to his face. What he used, according to Mr. Pike, was a lighted candle and a damp towel.
First it was an oath in explosive German, the tongue which puts a cutting-edge on profanity; then the mate's roar: "Is dat vat I tell you, you verfluchter fool? Vat? Vat? You don't understand ven I speak? I show you vat " The men who looked up were on the wrong side of the deck to make out what was happening, for the chart-house screened the drama from them.
A tremendous cutting-edge, nine feet in thickness, like the blade of a carpenter's plane, was being driven against the bridge by an irresistible force. Once again the endless thawing and chopping and gouging of ice began, but the more rapidly the encroaching edge was cut away the more swiftly did it bear down.
It can be readily understood that this continual selection of the most scrupulous consciences, the closest thinkers, and the least worldly characters in the church of my ancestors must have developed a singularly fine and cutting-edge temper in its adherents, and the succession of generations of men and women who had graduated in the school of Scripture dialectics, and knew every text and its various interpretations, made a community of Bible disputants such as even Massachusetts could not show.
The heart of the technorealist approach involves a continuous critical examination of how technologies whether cutting-edge or mundane might help or hinder us in the struggle to improve the quality of our personal lives, our communities, and our economic, social, and political structures."
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