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Classification of the Sci.
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hedonist, who thinks that man can wish for nothing but pleasure, has fallen into a damnable error from a mere confusion of thought. We should commit the same error if we supposed the gratification of curiosity were the sole, or the principal, object of theoretical science. Curiosity is their motive; but the gratification of curiosity is not their aim. What, then, are the practical sciences whose object is the gratification of curiosity? First, such sciences as those of Telescope-making, Microscope-making, Eartrumpet Making, Megaphone-making. Then all the sciences of making measuring instruments, densimeters, thermometers, dynamometers, ammeters, volameters, etc. For these do not aim at enabling us to learn anything in particular, but merely to gratify curiosity about no matter what. If Metho-