THREE:Machine-drawing may in some respects be said to bear the same relation to mechanics that writing does to literature; persons may copy manuscript, or write from dictation, of what they do not understand; or a mechanical draughtsman may make drawings of a machine he does not understand; but neither such writing or drawing can have any value beyond that of ordinary labour. It is both necessary and expected that a draughtsman shall understand all the various processes of machine construction, and be familiar with the best examples that are furnished by modern practice.
THREE:
THREE:Among exceptions to the ordinary plans of constructing trip-hammers, may be mentioned those employed in the American Armoury at Springfield, U.S., where small hammers with rigid frames and helves, the latter thirty inches long, forged from Lowmoor iron, are run at a speed of 'six hundred blows a minute.' As an example, however, they prove the necessity for elasticity, because the helves and other parts have to be often renewed, although the duty performed is very light, such as making small screws.
TWO:As he reached for the letter, and searched on the fourth page, all three of his listeners were holding their breath in suspense.On these foundations the lofty edifice of Spinozism was reared; out of these materials its composite structure was built; and without a previous study of them it cannot be understood.
TWO:"A beauty!" the Countess exclaimed, "And the same action as my own. I believe I know as much about it as my chauffeur. Captain Gifford, let me try it alone, do. Harris, give me a coat. No, one of the gentlemen's overcoats--that grey one will do. Do let me go round the square alone!"