<000005>Cutting tools include nearly all that are employed in finishing; lathes, planing machines, drilling and boring machines, shaping, slotting and milling machines, come within this class. The machines named make up what are called standard tools, such [120]as are essential and are employed in all establishments where general machine manufacture is carried on. Such machines are constructed upon principles substantially the same in all countries, and have settled into a tolerably uniform arrangement of movements and parts.
"About half-past-four. It must have been about that time, because just after I got back to my room the clock struck five. A motor car came up, one of the quietest I have ever heard. As the woman got in she stumbled, and the man swore at her. Then there was the strangest thing, the dull side of the motor car gleamed in places like silver, as if something had been rubbed off it by the woman as she fell. What do I think it was? Well, so far as I could make out, the car was all hung with black crape."The man became quite excited, and took hold of my sleeve. He looked me straight in the face, as if he wanted to find out by the expression of my eyes whether I spoke the truth. I could easily stand the scrutinising look, for I knew too well how utterly false those suspicions were. So I replied with great emphasis:Machinery of transmission being generally a part of the fixed plant of an establishment, experiments cannot be made to institute comparisons, as in the case of machines; besides, there are special or local considerationssuch as noise, danger, freezing, and distanceto be taken into account, which prevent any rules of general application. Yet in every case it may be assumed that some particular plan of transmitting power is better than any other, and that plan can best be determined by studying, first, the principles of different kinds of mechanism and its adaptation to the special conditions that exist; and secondly, precedents or examples.
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At that hour the Namur Canal ("Naamsche Vest") was already dark in consequence of the thick foliage of tall trees, and suddenly the wild horsemen were shot at. Several neutral witnesses established the fact that this was done by a small troop of German infantry who came from the station, probably on their way to the battle-field, and thought that Belgian cavalry came racing into the town.The ceremony wound up with a short silent prayer offered at the request of the parson.The upflow of currents of warmed water are a common cause of irregular cooling and springing of steel tools in hardening; the water that is heated, rises vertically, and the least inclination of a piece from a perpendicular position, allows a warm current to flow up one side.The lifting strain at the front end of a platen is of course increased as the height at which the cutting is done above its top, but this has not in practice been found a difficulty of any importance, and has not even required extra length or weight of platens beyond what is demanded to receive pieces to be planed and to resist flexion in fastening heavy work. The reversing movement of planing machine platens already alluded to is one of the most complex problems in machine tool movement.
