THREE:Boring may be divided into three operations as follows: chuck-boring on lathes; bar-boring, when a boring bar runs on points or centres, and is supported at the ends only; and bar-boring when a bar is supported in and fed through fixed bearings. The principles are different in these operations, each one being applicable to certain kinds of work. A workman who can distinguish between these plans of boring, and can always determine from the nature of a certain work which is the best to adopt, has acquired considerable knowledge of fitting operations."Marvellous!" Bruce cried. "It is exactly as you have said."
THREE:Between my tours through the Lige district I made a trip in the direction of Tongres, because I wanted to know what had become of all those Germans who had crossed the Meuse near Lixhe. It was remarkable to notice how friendly the Flemings of that district behaved with regard to the Germans. Although they criticised the violation of the country's neutrality sharply, and every family was proud of the sons who had taken up arms in defence of their Fatherland, yet they judged quite kindly the German soldiers who passed through their district. I often heard expressions full of pity toward those men, who could not help themselves, but were compelled to do whatever their superiors commanded them.
THREE:(1.) How may gauging implements affect the division of labour?(2.) In what way do standard dimensions affect the value of machinery?(3.) Why cannot cylindrical joints be fitted by trying them together?(4.) Under what circumstances is it most important that the parts of machinery should have standard dimensions?(5.) Which sense is most acute in testing accurate dimensions?(6.) How may slight variations in dimensions be made apparent to sight?He paused in some confusion. He had the profoundest respect for the cunning and audacity of the people with whom he had to deal. Was this some startling new plot that they had been working on him?