TWO:Machines with direct action, such as punches, shears, or rolls, require first a train of mechanism of some kind to reduce the motion from the driving power so as to attain force; and secondly, [105] this force must be balanced or resisted by strong framing, shafts, and bearings. A punching-machine, for example, must have framing strong enough to resist a thrust equal to the force applied to the work; hence the frames of such machines are always a huge mass, disposed in the most advantageous way to meet and resist this reactive force, while the main details of a drop-machine capable of exerting an equal force consist only of a block and a pair of guides to direct its course.In spiral gearing the line of force is at an angle of forty-five degrees with the bearing faces of the teeth, and the sliding movement equal to the speed of the wheels at their periphery; the bearing on the teeth, as before said, is one of line contact only. Such wheels cannot be employed except in cases where an inconsiderable force is to be transmitted. Spiral wheels are employed to connect shafts that cross each other at right angles but in different planes, and when the wheels can be of the same size.
TWO:
TWO: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.If it were not for securing vent for gas, moulds could be made from plastic material so as to produce fine castings with clear sharp outlines.
TWO:"Last night a shooting affray took place. There is no evidence that the inhabitants of the towns had any arms in their houses, nor is there evidence that the people took part in the shooting; on the contrary, it seems that the soldiers were under the influence of alcohol, and began to shoot in a senseless fear of a hostile attack.On the afternoon of the 23rd the hostile troops entered the town, and on that day the inhabitants had not to suffer, excepting from requisitions made. But the following evening it was suddenly on fire at various spots, and the soldiers began to shoot in all directions, making many victims. Before setting the houses on fire, with a liberal use of the lozenges mentioned already, the usurpers ransacked them and removed numerous pieces of valuable furniture. The Place d'Armes, the Place Lopold, the Rue St. Nicolas, Rue Rogier, and the Avenue de la Plante were almost entirely reduced to ashes. With the town-hall many valuable pictures were destroyed. The day following the conflagration they left off shooting at last, but the looting went on for days more.