Railroad Engineers' Field-book and Explorers' Guide: Especially Adapted to the Use of Railroad Engineers on Location and Construction, and to the Needs of the Explorer in Making Exploratory Surveys
J. Wiley & sons, 1890 - 358 Seiten
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according accurate adjustment allowance altitude amount angle applied assume average base bearing calculated cause centre chord consider considerably construction correct cost Cotang course cross-section curvature curve dealing difference direction distance elevation engine equal Equation error Exsec feet foot force formula given gives grade ground horizontal hour inches increase latitude length less locate means measure meridian method miles necessary notes object observed obtain offset opposite ordinary parallel plotting position possible practice probable radius rails reduced regards represent resistance scale seconds shown side sidereal simple Sine slopes speed star station straight sufficient suppose surface taken taking tangent telescope tion track train transit triangle true usually varies vers vertical weight yards
Seite 106 - Of mensuration, trigonometry, surveying, hydraulics, hydrostatics, instruments and their adjustments, strength of materials, masonry, principles of wooden and iron roof and bridge trusses, stone bridges and culverts, trestles, pillars, suspension bridges, dams, railroads, turnouts, turning platforms, water stations, cost of earthwork, foundations, retaining walls, etc. In addition to which the elucidation of certain important principles of construction is made in a more simple manner than heretofore....
Seite 236 - Nitric acid will produce a black spot on steel ; the darker the spot the harder the steel. Iron, on the contrary, remains bright if touched with nitric acid. Good steel in its soft state has a curved fracture and a uniform grey lustre ; in its hard state, a dull, silvery, uniform white.
Seite 105 - Polytechnic Inst., Troy. This volume contains many short and unique methods of Laying Out, Locating, and Constructing Compound Curves, Side Tracks, and Railroad Lines generally. It is also intended as a text-book for Scientific Schools. Pocketbook form.
Seite 106 - AN ELEMENTARY COURSE OF CIVIL ENGINEERING. WHEELER. For the use of the Cadets of the United States Military Academy. By JB Wheeler, Prof, of Civil and Military Engineering, West Point, NY With many fine wood engravings. New edition, revised...
Seite 235 - For the purpose of seasoning, timber should be piled under shelter, where it may be kept dry, but not exposed to a strong current of air ; at the same time, there should be a free circulation of air about the timber, with which view...
Seite 106 - Mr. Wellington has done great service to the Railroad profession - more particularly to Engineers, Managers, and Superintendents, by bringing together in a single volume such a mass of valuable matter. It should be in every Railway Library."— Railway Age.
Seite 234 - ... uniform color. If the top has a regular, rounded form ; if the bark is dull, scabby, and covered with white and red spots, caused by running water or sap, — the tree is unsound. The decay of...
Seite 249 - ... out the object-glass, so as to bring the vertical wire upon an object as near as the range of the telescope will allow. Having this clearly in mind, unclamp the limb, turn the instrument half-way around, reverse the...
Seite 250 - When both wires in succession have been thus treated, the line of collimation is adjusted on the near object, and the telescope again brought upon the most distant point ; here the tube is again revolved, the reversion of the wires upon the object once more tested, and the correction, if necessary, made in the same manner. He proceeds thus until the wires will reverse upon both objects in succession ; the line of collimation will then be in adjustment at these and all intermediate points, and by...