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allow amount angle applied arch average bearing bottom braces bridge cables cars cause cent centre chord coke compression connected cost course cross cubic curve cylinder depends depth diameter dimensions direction distance double earth effect engine equal expense feet five fixed foot force formula four freight fuel given gives grades ground half heat horizontal hundred inches inclined increase iron joints laid latter length less load locomotive lower manner masonry material mean miles miles per hour motion moving nature nearly necessary operation passenger passing pile placed plate pounds pressure proper proportion rail railroad resistance rise road rock rods shown shows side slope span speed square steam stone strength surface tension thickness timber tons trains truss tubes twenty vertical weight wheels whole wood
Page 415 - McCallum's words, each officer had "the authority with the approval of the President and General Superintendent to appoint all persons for whose acts he is held responsible, and may dismiss any subordinate when, in his judgment, the interest of the company will be promoted thereby.
Page 414 - ... (4) Great promptness in the report of all derelictions of duty, that evils may be at once corrected. (5) Such information, to be obtained through a system of daily reports and checks, that will not embarrass principal officers nor lessen their influence with their subordinates. (6) The adoption of a system, as a whole, which will not only enable the General Superintendent to detect errors immediately, but will also point out the delinquent.
Page 400 - ... hydraulic press; no alteration of the iron could be discovered by the naked eye on the surface of rupture, but, tried with a microscope, the fibres appeared without adhesion, like a bundle of needles. A third axle w.as subjected, during twelve hours, to 338,000 torsions, and broken in two; a change in its texture and an increased size in the grain of the iron were observed by the naked eye.
Page 64 - ... with mortar. Each stone before being laid shall be carefully cleaned and moistened, and masonry built in hot weather shall be protected from the sun as fast as laid by covering with boards. No masonry shall be laid in freezing weather. No hammering will be allowed on a course after it is set. The following modifications of the specifications apply to the up-stream pier-heads or ice-breakers.
Page 79 - ... allowed, unless a written order to perform such work shall have been given by the engineer ; or unless the work be subsequently certified by him, and the certificate produced at the time of demanding the payment of the monthly estimate next after such work shall have been performed. SUB-CONTRACTS. The contractor will be required to perform the work himself, and no subcontracts relieving him from the responsibility of a proper performance of his contract will be permitted, unless by the written...
Page 78 - The contractor shall discharge from his service, when required by the engineer, any disorderly, dangerous, insubordinate, or incompetent person employed on or in the vicinity of the works under construction by the United States. None but skilled foremen or workmen shall be employed on work requiring special qualifications.
Page 82 - And the said parties of the first part do hereby covenant, grant, promise and agree, to and with the said party of the...
Page 414 - to be efficient and successful, should be such as to give to the principal and responsible head of the running department a complete daily history of details, in all their minutiae.
Page 399 - ... crystalline structure in wrought iron through vibrations. M. Bourville's apparatus consisted of a bent axle, which was firmly fixed up to the elbow in timber, and which was subjected to torsion by means of a cog-wheel connected with the end of the horizontal part. At each turn the angle of torsion was twenty-four degrees. A shock was produced each time that the bar left one tenth to be raised by the next.