Central Station Volume 4

Central Station Volume 4

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1904 edition. Excerpt: ...two: the globe being frosted, the glare of the filament is removed and the light made soft and easy on the eyes; and a reflector being used, the light is thrown down where needed. These are two essentials of good illumination on which illuminating engineers have been insisting for years past. It is a peculiar comment on lamp makers and users that little or no effort was made to insure these results until the advent of the Nernst lamp induced the large frosted spherical incandescent as an imitator. To imitate the good results obtained was pardonable; but to imitate mere appearance, when equally good and even better results can be obtained by much simpler and less expensive means can be justified only by the questionable argument of personal gain from the original work of others. A frosted lamp of the ordinary type, placed under a good prismatic reflector, will do all, probably more than the large lamps in question. Why then the extra expense of the large bulb with its attendant increase in the other processes of manufacture, all of which must be discarded as soon as the filament has lived its natural life? As a "means of grace" in educating the public to better effects in illumination, these lamps may justify their existence. A marked improvement in the accessories of illumination is evident from year to year. Among these the most notable progress is in large use being made of prismatic glass for distributing and diffusing light. Though unheralded by any extravagant proclamations and promises, the introduction of these prismatic globes and reflectors was an epochmarking event. Their true merits are only beginning to be appreciated; the advance of better practises in illumination will be marked by the increasing use of this valuable...
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Product details

  • Paperback | 174 pages
  • 189 x 246 x 9mm | 322g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236507150
  • 9781236507150