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adjustment advantage already amount angle appears applied arrangement attached bear becomes brought carried cast causes centre chuck circular connection considerable course cutter cutting diameter direction distance drill driven edge effect employed enable engraving equal extent extremity face feed figure fixed flat frequently gauge gearing give given greater groove hand height hole horizontal inch increased iron kind lathe latter length less lower machine mandril manner material means measuring mechanical mentioned metal method motion necessary obtained operation ordinary parallel passed piece pinion placed plane plate portion position possible present pressure produced pulley punch removed rendered represented rest revolve round screw seen shaft shearing shown side similar slide speed standard steel sufficient supported surface teeth thickness threads tool true turning upper various vertical wheel width wood workshop
Page 2 - The second is of those who labour to extend the power of their country and its dominion among men. This certainly has more dignity, though not less covetousness. But if a man endeavour to establish and extend the power and dominion of the human race itself over the universe...
Page 1 - ... quellers of tyrannies, and the like) they decreed no higher honours than heroic. And certainly if a man rightly compare the two, he will find that this judgment of antiquity was just. For the benefits of discoveries may extend to the whole race of man, civil benefits only to particular pla ces ; the latter last not beyond a few ages, the former through all time.
Page 1 - In the first place then, the introduction of famous discoveries appears to hold by far the first place among human actions ; and this was the judgment of the former ages. For to the authors of inventions they awarded divine...
Page 273 - ... same moment. It may be observed that there are several points of difference between the cam and lever of the single-ended machine and those of the combined machine which we are now discussing. In the present instance the cams. do not act upon the extremities of the longer arms of the levers.—which they could not do without considerable addition to the total length of the machine. Consequently the power obtained is proportionately reduced, although in many cases the much greater economy of space...