HEADLIGHT TESTS C. Francis Harding and A. N. Topping Vol. xxix-1910, pp. 1053-1081 Experimental investigation of locomotive headlights to ascertain the relative merits of ordinary oil and powerful electric headlights. Road tests on the operation of colored light signals and obstructions on the tracks. Laboratory tests of illumination characteristics; spectral intensities, and reflections from signal lamp roundels with different types of headlights. Tabulated and plotted data and characteristic curves of the performance of the different types of headlights. Discussion, pp. 1082-1089, by Messrs. C. A. B. Halvorson, Jr., John B. Taylor, George H. Stickney, Harry Barker, C. P. Steinmetz, Charles F. Scott, George A. Hoadley, Harry P. Wood, J. C. Lincoln, and C. Francis Harding. General discussion of high-power vs. low-power headlights, with some results of tests. F. INDUSTRIAL RAILWAYS AND TELPHERAGE TELPHERAGE Chas. M. Clark Vol. xix-1902, pp. 435-453 Brief outline of history of development of telpherage. Description of present methods of construction and operation, profusely illustrated with line drawings and photographs of different types of machinery and methods of application. Discussion (included with that of paper by George F. Sever on "Power Consumption of Elevators Operated by Alternating and Direct-Current Motors"), pp. 454-486, by Messrs. Charles P. Steinmetz, John D. Ihlder, A. V. Abbott, Philip Torchio, Ralph D. Mershon, George F. Sever, Arthur Williams, Edward P. Thompson, F. V. Henshaw, H. G. Stott, Douglass Burnett, F. H. Taylor, M. Wellman, Henry H. Humphrey, P. B. Woodworth, R. H. Pierce, James Lyman, David Lofts, J. W. Mabbs, A. D. Ayres, M. Hobart, A. H. Cutler, E. B. Clark, and L. A. Nichols. Load characteristics and power requirements of elevator service. Alternating-current vs. direct-current motors for elevator service. Acceleration, speed and energy consumption in electric elevator service. F. L. Sessions STORAGE-BATTERY INDUSTRIAL LOCOMOTIVES Vol. xxii-1903, pp. 109-123 General discussion of storage-battery locomotives—their advantages; methods of operating the battery; calculation of battery rating for given service; motor control, etc. Tables for facilitating the calculation of storage-battery rating, with numerical example illustrating their use. Discussion, pp. 124-131, by Messrs. Edgar H. Berry, F. L. Sessions, and Elmer A. Sperry. General remarks on storage-battery performance in industrial locomotive service, and criticisms of author's tables. G. CANAL BOAT HAULAGE NOTES ON ELECTRIC HAULAGE OF CANAL BOATS Lewis B. Stillwell and H. St. Clair Putnam Vol. xxvii-1908, pp. 227-316 Description of tests made on the Lehigh Canal, to determine the power requirements, the speed and length of tow and the relative merits of mules, electric locomotives and electric tractors. A general discussion of canal-boat resistance comparing these tests with the results of those of other tests. Discussion, pp. 317-320, by Messrs. Richard Lamb, Charles P. Steinmetz, and L. B. Stillwell. 18. LIGHT LIGHTING AND LAMPS A. LIGHT PRODUCTION AND MEASUREMENT A NOTE ON AN ACETYLENE-IN-OXYGEN FLAME Clayton H. Sharp Vol. xix-1902, pp. 51-54 Description of an acetylene flame burner which might be used as a standard of intensity. Spectrophotometric curve of acetylene and other flames. Discussion, incorporated with that of paper by William J. Hammer on "Edison's Tungstate of Calcium Lamp-The Nernst Lamp-Radium, Polonium and Actium." THE PRESENT STATUS OF THE QUESTION OF A STANDARD OF LIGHT Clayton H. Sharp Vol. xix-1902, pp. 55-57 Brief reference to some of the shortcomings of the present standards of luminous intensity. Advantages of acetylene flame as standard. Discussion, incorporated with that of paper by William J. Hammer on "Edison's Tungstate of Calcium Lamp-The Nernst Lamp-Radium, Polonium and Actium." Chas. F. Scott PHOTOMETRY AND ILLUMINATION Vol. XX-1902, pp. 55-57 AN INTEGRATING PHOTOMETER FOR GLOW LAMPS AND SOURCES OF Chas. P. Matthews Vol. xx-1902, pp. 59-70 Theory, design, construction and operation of a special intensity photometer invented by the author for use in making photometric measurements of incandescent lamps and flames. Discussion, incorporated with that of paper by Clayton H. Sharp on "The Commercial Accuracy of Photometrical Measurements." SOME METHODS OF PHOTOMETRY AS APPLIED TO INCANDESCENT LAMPS J. T. Marshall, Vol. xx-1902, pp. 77-85 A description of method of calibrating and using sliding scale photometer for commercial testing and inspection of incandescent lamps. Discussion, incorporated with that of paper by Clayton H. Sharp on "The Commercial Accuracy of Photometrical Measurements." THE COMMERCIAL ACCURACY OF PHOTOMETRICAL MEASUREMENTS Clayton H. Sharp Vol. xx-1902, pp. 87-93 Experimental investigation of the limits of accuracy in different classes of photometrical measurements. Discussion (including that of paper by Charles P. Matthews on "Integrating Photometer for Glow Lamps and Sources of Light Intensity;" paper by Douglass Burnett on "Distributed Lighting," and paper by J. T. Marshall on "Some Methods of Photometry as Applied to Incandescent Lamps"), pp. 94-110, by Messrs. Douglass Burnett, Edward L. Nichols, Francis R. Upton, L. B. Marks, W. S. Howell, F. S. Smith, Edward B. Rosa, Calvin W. Rice, William J. Hammer, W. S. Stratton, Clayton H. Sharp, J. T. Marshall, Charles F. Scott, Charles P. Matthews, Edward P. Thompson, Alex J. Wurts, R. H. Henderson, Max Von Reckinghausen, P. M. Lincoln, N. W. Storer, and F. W. Jones. Merits of mean spherical candle-power method of rating illuminants. Methods of measuring illumination. Description of Cooper-Hewitt mercury vapor lamp. TRANSFORMATION OF ELECTRIC POWER INTO LIGHT Charles P. Steinmetz Vol. xxv-1906, pp. 789-813 Analytical discussion of the different methods of transforming electric energy into light, covering incandescent solids, selective radiation and luminescence of vapors and gases. Ideal efficiencies of the various methods and practical means of approaching them with the modern types of illuminants. Equations for volt-ampere characteristics of various kinds of arcs. Theory of arc conduction and e. m. f. rectification. Discussion, incorporated with paper by Clayton H. Sharp on "New Types of Incandescent Lamps." Charles P. Steinmetz PRIMARY STANDARD OF LIGHT Vol. xxvii-1908, pp. 1319-1324 Criticism of primary standard based on energy of radiation, recommending standard composed of three component colors of definite wave lengths. Discussion, pp. 1325-1339, by Messrs. A. E. Kennelly, Edwin P. Hyde, W. S. Franklin, Carl Hering, Clayton H. Sharp, C. A. Perkins, John B. Taylor, E. B. Rosa, H. S. Carhart, and Charles P. Steinmetz. General remarks on Steinmetz' proposed standard. Motion carried to refer question of establishing standard to the Bureau of Standards. Louis Bell B. LIGHTING METHODS OF ILLUMINATION Vol. xix-1902, pp. 5-27 A discussion on the physiological and practical side of illumination. Outline of the qualities that should be possessed by illuminants for practical illumination. Discussion of the present status of light standards and the art of photometric measurements. Requirements of street lighting and general indoor lighting, with characteristics and relative merits of various illuminants. Discussion, incorporated with that of paper by William J. Hammer on "Edison's Tungstate of Calcium Lamp-The Nernst Lamp-Radium, Polonium and Actium." W. D'A Ryan STREET ILLUMINATION AND UNITS OF LIGHT Vol. xix-1902, pp. 29-41 Photometric study of arc lamps for street lighting, showing the effects of variation, wandering and flicker of the arc on the distribution of the light, and of candle-power and spacing on the energy consumption for a given illumination. Tests on open and enclosed direct-current and alternating-current arc lamps. Discussion, incorporated with that of paper by William J. Hammer on "Edison's Tungstate of Calcium Lamp-The Nernst Lamp-Radium, Polonium and Actium." SOME COMMON DIFFICULTIES IN EXTERIOR ILLUMINATION S. Everett Doane Vol. xix-1902, pp. 43-46 Consideration of the actual value of illumination to observer, showing effect of candle-power and spacing of lamps thereon. Advantages of incandescent lamps for street lighting. Discussion, incorporated with that of paper by William J. Hammer on "Edison's Tungstate of Calcium Lamp-The Nernst Lamp-Radium, Polonium and Actium." DISTRIBUTED LIGHTING Douglass Burnett Vol. xx-1902, pp. 71-76 General discussion of indirect lighting, pointing out the effects of reflection and diffusion on illumination. Suggested method of measuring illumination directly. Bibliography. Discussion, incorporated with that of paper by Clayton H. Sharp on "The Commercial Accuracy of Photometrical Measurements." Chas. F. Scott RAILWAY TRAIN LIGHTING Vol. xxi- 1903, pp. 129-131 AN ELECTRIC CAR LIGHTING SYSTEM. W. L. Bliss Vol. xxi-1903, pp. 133-154 Description of an axle-driven car lighting system with generator and storage battery, the e. m. f. being controlled by special booster. Detailed explanation of the construction and mode of operation, so as to produce constant e. m. f. under usual conditions of railway service. Discussion, incorporated with that of paper by George D. Shepardson on "Some of the Problems of Electric Train Lighting." AXLE-LIGHTING Elmer A. Sperry Vol. xxi-1903, pp. 155-162 Reference to some of the earliest electric car lighting installations. Criticisms of present methods and announcement of method employing an axle-driven constant-speed generator. Discussion, incorporated with that of paper by George D. Shepardson on "Some of the Problems of Electric Train Lighting." |