The Illuminating Engineer, Volume 5Illuminating Engineering Publishing Company, 1911 - Lighting |
Contents
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Common terms and phrases
acetylene arc lights architecture artificial light artistic building burner candle power candle-power carbon ceiling cent central station classification yard color commercial cost curve daylight decorative distribution effect efficiency Elec electric lamps electric light electric signs electrolier engi entirely equipped fact filament lamps flaming arc lamp flectors foot-candles furnish gas lamps gas lighting gas mantle gineering give glare glass glassware globe Holophane illu illustrated important improvement incandescent lamps indirect lighting industry intensity interest Light Company light-sources lighting fixtures lighting system lighting units lumination manufacturers Mazda means ment merchants metal filament method modern nating engineering night ornamental pany paper photometric placed polar curve possible practical present problem produced progress public lighting railroad reflectors shown in Fig standard street lighting tical tion tube tungsten lamps ture watts York
Popular passages
Page 269 - This course should have three objects: (i) to indicate the proper co-ordination of those arts and sciences which constitute illuminating engineering; (2) to furnish a condensed outline of study suitable for elaboration into an undergraduate course for introduction into the curricula of undergraduate technical schools, and (3) to give practicing engineers an opportunity to obtain a conception of the science of illuminating engineering as a whole.
Page 269 - ... university under the joint auspices of the university and the Illuminating Engineering Society.
Page 161 - In endeavoring to present the view (now quite generally accepted) that the eyes themselves may (when defective in refraction or when imperfectly adjusted so that they fail to work in harmony with each other) constitute an important and too commonly neglected factor, both in causing and perpetuating disease, I believe and trust that I shall open to the minds of some of my readers a field worthy of serious thought and careful consideration. Within the past few years the attention of the medical profession...
Page 162 - The literature of medicine goes to prove conclusively that the duration of life is materially shortened by nervous debility and the disease which it entails. Any factor, therefore, in their causation ought not to be overlooked. This subject of inquiry has become invested with an importance which cannot well be ignored by searchers after truth.
Page 205 - Intent plays a large part in ethics, and it is quite impossible to lay down any hard and fast rule which can be followed to the exclusion of considerations of motive.
Page 270 - Philadelphia. The laboratory demonstrations will be under the direction of Charles O. Bond, manager of Photometric Laboratory, United Gas Improvement Company, Philadelphia; Herbert E. Ives, Ph.D., Physicist, Physical Laboratory, National Electric Lamp Association; Pretson S. Millar, Electrical Testing Laboratories, New York; General Secretary, Illuminating Engineering Society. Cards of admission may be obtained by application to the Johns Hopkins University. May 19, 1910. American Institute of Electrical...
Page 54 - ... effects : — (1) The difficulty experienced in forming a judgment in the case of differently coloured lights, and the possibility that the judgments of different people may not be the same. (2) The fact that the apparent relative brightness of two surfaces, illuminated by light of different colour, depends on the part of the retina on which the image of them is received. (3) The Purkinje phenomena. (4) The possibility, when mirrors are made use of, that the coefficient of reflexion may not be...
Page 214 - ... York section two papers were presented. One on " A High Efficiency Reflector for Street Lighting," by Dr. CH Sharp, and the other on " Illumination Tests," by Dr. CH Sharp and Preston S. Millar. The following introductory paragraph from Dr. Sharp's paper will express the subject of street lighting. " The problem of the satisfactory illumination of public streets and highways is one which we shall always have with us. The extent of the streets requiring illumination is practically limitless and...
Page 528 - Siedentopf has devised a metal prism with slides which permit the vertical micrometric motion of a minute plane, analogous to the familiar mechanical stage of the ordinary bacteriological microscope. In the examination of spontaneous crystallization in ruby glass Dr. Zsigmondy recalls the well-known analogy existing between the formation of ruby glass and the devitrification of amorphous substances. Differentiating between amicroscopic and sub-microscopic particles with reference to " perfect " or...
Page 269 - This apparatus will be at the disposal of those who attend and an opportunity will be afforded to undertake laboratory work during the term of the lecture course under the supervision of trained experts of the University and of the Society. A fee of $25 will be charged for admission to the course and to the accompanying laboratory instruction. The complete course of thirty-six lectures will be given between the dates October 26 and November 8, 1910, inclusive. " • " " ' : ' • * LECTURES ON ILLUMINATING...