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1. The most economical and effectual mechanism for handling is that which places the amount of force and rate of movement continually under the control of an operator.It may also be mentioned that lathes constructed with angular guides, have usually such ways for the moving heads as well as for the carriages; this gives the advantage of firmly binding the [125] two sides of the frame together in fastening the moving head, which in effect becomes a strong girt across the frame; the carriages also have an equal and independent hold on both sides of a shear. In following this matter thus far, it may be seen how many conditions may have to be considered in reasoning about so apparently simple a matter as the form of ways for lathe carriages; we might even go on to many more points that have not been mentioned; but what has been explained will serve to show that the matter is not one of opinion alone, and that without practical advantages, machine tool-makers will not follow the most expensive of these two modes of mounting lathe carriages.They took me to two officers who stood near the bridge, and told them that I "pretended" to be a Netherland journalist. Having proved this by my papers, the officers gave me an escort of three men, who conducted me to the bridge-commander, on the other side of the Meuse.

�"In Amsterdam...."�

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But the inhabitants were treated even then in a most vexatious manner, and on August 14th (the destruction came about on the 16th) I wrote to De Tijd (No. 20457):—�We waited in the street for two of the soldiers who went to fetch the old man. After waiting a good while the poor wretch appeared between them. He wept profusely, and between his loud sobs affirmed repeatedly that he was innocent, that he did not know me, that I told him I was a Netherland journalist, and so on, and so on: "Oh, gentlemen!—oh, gentlemen!" he exclaimed, "I must not leave my little boy ... my laddie; ... he is quite alone.... Oh, let me go!" ...

�Strains caused by cutting action, in planing or other machines, fall within and are resisted by the framing; even when the tools are supported by one frame and the material by another, such frames have to be connected by means of foundations which become a constituent part of the framing in such cases.

"August 8th."�The steam cylinder which moves the hammers is set in the earth at some depth below the plane upon which they move, and even when the heaviest work is done there is no perceptible jar when one is standing near the hammers, as there always is with those which have a vertical movement and are single acting.

Trip-hammers employed in forging bear a close analogy to, and were no doubt first suggested by, hand-hammers. Being the oldest of power-forging machines, and extensively employed, it will be proper to notice trip-hammers before steam-hammers."Oh no, sir, not at all!"For milling, drilling or boring ordinary work within its range, a lathe is by no means a makeshift tool, but performs these various operations with nearly all the advantages of machines adapted to each purpose. An ingenious workman who understands the adaptation of a modern engine lathe can make almost any kind of light machinery without other tools, except for planing, and may even perform planing when the surfaces are not too large; in this way machinery can be made at an expense not much greater than if a full equipment of different tools is employed. This of course can only be when no division of labour is required, and when one man is to perform all the several processes of turning, drilling, and so on.

"The acting burgomaster, A. Nerincx.22To attain a double effect, and avoid the loss pointed out, Mr Ramsbottom designed what may be called compound hammers, consisting of two independent heads or rams moving in opposite directions, and acting simultaneously upon pieces held between them.

�CHAPTER XX. GENERALISATION OF SHOP PROCESSES.At Fort Pontisse or Lierce they seemed to have noticed that the factory was a station for observation. As the officer was still thinking about my case, one of those infernal monster shells crashed down among a group of soldiers, only some yards away. Those who were not hit ran away, but they came back soon, and took up seven or eight comrades, whom they carried into the factory. I shuddered when I saw what had happened, and through the shock the sight gave me I involuntarily jerked my arms.