Van Nostrand's Engineering Magazine, Volumen30D. Van Nostrand, 1884 |
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algebraic annealed arches Average axle battery beam boilers bridge canal carbon cell cent coal column combustion compression concrete condensing construction copper corrosion crucible steel curve cylinder diameter distance economy electric engine experiments feet 6 inches flange foot formula fracture friction gallons gases heat holes horse power hour Illustrated inches thick increase iron and steel joint kinetic engines leading wheel length less line shafting load magnetic manganese manganese bronze mean effective pressure means ments metal meters method mild steel obtained oxide piers pipes piston pounds pressure Prof pump punched quantity rail railway ratio reservoir resistance rivets sheared side solid plate specimen speed square inch steam strength stress Suez Canal supply surface tained temperature tensile tensile strength testing machine tion tons trailing wheel trial tubes ventilation vessels walls weight wire wrought iron zinc
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Página 359 - There cannot be a greater mistake than that of looking superciliously upon practical applications of science. . The life and soul of science is its practical application, and just as the great advances in mathematics have been made- through the desire of discovering the solution of problems which were of a highly practical kind in mathematical science, so in physical science many of the greatest advances that have been made from the beginning of the world to the present time have been made in the...
Página 283 - ... the art of directing the great sources of power in nature for the use and convenience of man, as the means of production and of traffic in states.
Página 400 - THE ART OF SOAP-MAKING. A Practical Handbook of the Manufacture of Hard and Soft Soaps, Toilet Soaps, &c. Including many New Processes, and a Chapter on the Recovery of Glycerine from Waste Leys. By ALEXANDER WATT.
Página 483 - No. 43. WAVE AND VORTEX MOTION. By Dr. Thomas Craig, of Johns Hopkins University. No. 44. TURBINE WHEELS. By Prof. WP Trowbridge, Columbia College. Second edition. Revised.
Página 181 - Practical engineers, as well as scientists, have demonstrated that solar energy cannot be rendered available for producing motive power, in consequence of the feebleness of solar radiation. The great cost of large reflectors, and the difficulty of producing accurate curvature on a large scale, besides the great amount of labor called for in preventing the polished surface from becoming tarnished, are objections which have been supposed to render direct solar energy practically useless for producing...
Página 316 - ... minutes, when ak = 100. To obtain the horizontal distance or the difference of level in any case, the corresponding value of c cos n or c sin n must further be added; and the mean of each of these expressions, for each degree, with three of the most common values of c, is given under each column.
Página 345 - No. 26. PRACTICAL TREATISE ON THE PROPERTIES OF CONtinuous Bridges. By Charles Bender, CE No. 27.
Página 309 - For this method the rod is arbitrarily graduated, so that, at the distance of an average sight, the same number of units of the graduation are intercepted, between the stadia wires on the rod, as units of length are contained in the distance. For any other distance, however, this proportionality does not remain the same; for, according to the preceding demonstration, the reading on the rod is proportional to its distance, not from the center of the instrument, but from a point at a distance
Página 182 - The reflecting plates, each 3 inches wide and 26 inches long, intercept a sunbeam of 130x180=23,400 square inches section. The trough is supported by a central pivot, round which it revolves. The change of inclination is effected by means of a horizontal axle — concealed by the trough— the entire mass being so accurately balanced that a pull of five pounds applied at the extremity enables a person to change the inclination or cause the •whole to revolve.
Página 483 - No. 47.— LINKAGES ; THE DIFFERENT FORMS AND USES OF ARTICULATED LINKS. By JDC de Roos. No. 48.— THEORY OF SOLID AND BRACED ARCHES By William Cain, CE No 49.— ON THE MOTION OF A SOLID IN A FLUID.