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          The following are suggested as subjects which may be studied in connection with lathes and turning: the rate of cutting movement on iron, steel, and brass; the relative speed of the belt cones, whether the changes are by a true ascending scale from the slowest; the rate of feed at different changes estimated like the threads of a screw at so many cuts per inch; the proportions of cone or step pulleys to insure a uniform belt tension, the theory of the following rest as employed in turning flexible pieces, the difference between having three or four bearing points for centre or following rests; the best means of testing the truth of a lathe. All these matters and many more are subjects not only of interest but of use in learning lathe manipulation, and their study will lead to a logical method of dealing with problems which will continually arise.



          ”  2019年,东川区实现脱贫摘帽。

          After a few encouraging words I walked on along the solitary, deserted road, leaving the canal on the right, until a by-way took me to the bank of the Meuse, opposite the Netherland frontier village Eysden. I entered a deserted inn. After shouting for a long time, the inn-keeper appeared, looked shyly at me, remaining constantly close by the door of his room. His attitude showed that he was prepared to fly at the slightest suspicious movement on my part; but as soon as I had convinced him that I was a Netherland journalist, he became more friendly, and called his wife and daughters, so that I might tell them all I knew. They were very desirous to know how the war went ... in the Netherlands, and whether we were fighting the Germans or the English? It was very difficult to make them understand that they were under a misapprehension, but when I had at last succeeded in this, I started in my turn to ask them what they thought of my intention to go farther.


          In metal working, owing to a more perfect division of labour, and a more intelligent manipulation than in wood-working, there is less combination in machines—in fact, a combination machine for metal work is rarely seen at this day, and never under circumstances where it occasions actual loss. The advantage of combination, as said, can only be in the framing and floor space occupied by the machines, but these considerations, to be estimated by a proper standard, are quite insignificant when compared with other items in the cost of machine operating, such as the attendance, interest on the invested cost of the machine, depreciation of value by wear, repairing, and so on.


          As remarked, every attempt to generate anything new in machinery should be commenced by ascertaining a want of improvement. When such a want has been ascertained, attention should be directed first to the principles upon which such want or fault is to be remedied. Proper mechanism can then be supplied like the missing links in a chain. Propositions thus stated may fail to convey the meaning intended; this systematic plan of inventing may be better explained by an example.



          And the commanding officer gave me a pass, on which this very same colonel who had prohibited me to write in my paper what troops were at Riemst, put a stamp on that pass, which contained the German eagle, and besides this the words: "Royal Prussian 8, Reserve Infantry Regiment, II Battalion." This confirmed what the rumours said, that the troops who had passed through Visé and other places during the last days and committed those atrocities there, were the reserves which had been called up, among whom discipline is less strict than among the younger men, who arrived in these districts during the earlier days.

          I felt not the slightest inclination to go and see what was the matter, but I stretched myself and yawned, feeling much more tired after a couple of hours' rest than when I went to bed. The uproar went on, and suddenly I thought that I also heard a hubbub in the café downstairs. And, really, it came ever nearer. People rushed up and down the stairs, screamed and yelled, doors were banged, in short it was as if they were pulling down the house.

          Patterns that are deep, and for castings that require to be parallel or square when finished, are made with the least possible amount of draught. If a pattern is a plain form, that affords [99] facilities for lifting or drawing, it may be drawn without taper if its sides are smooth and well finished. Pieces that are shallow and moulded often should, as a matter of convenience, have as much taper as possible; and as the quantity of draught can be as the depth of a pattern, we frequently see them made with a taper that exceeds one inch to the foot of depth.

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