ONE:(1.) In what respect are air and water like belts and gearing, as means to transmit power?(2.) What are some of the principal advantages gained by employing air to operate railway brakes?(3.) Name some of the advantages of centralising motive power.(4.) Are the conditions of working an engine the same whether air or steam is employed?"So we have met at last," he said. "Well, murderess?"
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ONE:A great share of the handling about an engineering establishment is avoided, if material can be stored and received on a higher level than the working floors; if, for instance, coal, iron, and sand is received from railway cars at an elevation sufficient to allow it to be deposited where it is stored by gravity, it is equivalent to saving the power and expense required to raise the material to such a height, or move it and pile it up, which amounts to the same thing in the end. It is not proposed to follow the details [74] of shop arrangement, farther than to furnish a clue to some of the general principles that should be regarded in devising plans of arrangement. Such principles are much more to be relied upon than even experience in suggesting the arrangement of shops, because all experience must be gained in connection with special local conditions, which often warp and prejudice the judgment, and lead to error in forming plans under circumstances different from those where the experience was gained.
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ONE:The reader, in order to better understand what is said, may keep in mind a common shaping machine with crank motion, a machine which nearly fills the requirements for cutting tooth racks.To illustrate the practical application of what has preceded, let it be supposed, for example, that a machine is to be made for cutting teeth in iron racks ? in. pitch and 3 in. face, and that a design is to be prepared without reference to such machines as may already be in use for the purpose.
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ONE:"Somebody in the house," the sergeant explained sketchily. "Caretaker or something of that kind, or so we imagined. Call on the telephone."I had walked another three miles, when a big crowd of fugitives met me. They seemed to have come a long way, for the majority could hardly walk on, and had taken off their shoes and boots, on account of the scorching heat, going on barefooted in the shade of the tall trees. It was a procession, numbering hundreds of men, women, and children. The aged were supported, the babies carried. Most of them had a small parcel on their back or under their arm. They seemed tired to death, had dark red faces, and betrayed great fear and nervousness. I crossed the road to speak to them, and as soon as they noticed it the whole crowd, numbering hundreds of people, stood still, creeping closer together, women and girls trying hard to hide themselves behind the men, and these doffed their caps timidly.
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ONE:with honour may repay Thee,(1.) Why is the effect produced different on the top and bottom of a piece when struck by a hammer?(2.) Why does not a compound hammer create jar and concussion?(3.) What would be a mechanical difficulty in presenting the material to such hammers?(4.) Which is most important, speed or weight, in the effect produced on the under side of pieces, when struck by single acting hammers?
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