Practical Illumination
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Practical Illumination

Practical Illumination


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About the Book

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. 1907 Excerpt: ...wanted in any portion with the possible exception of the piano, and for this, sufficient light is obtained from the chandelier. The chandelier is equipped with three globes, such as shown in Fig. 79, these being designed to concentrate much of the light in the direction in which the tip of the lamp points. This chandelier in Fig. 212 was previously equipped with opaline bell reflectors, which allowed so much of the light to escape towards the ceiling that there was not enough at the piano and in the lower part of the room. It is a mistake to equip a chandelier of this kind with any type of globe or reflector which will give a general distribution of light at a wide angle below the horizon tal unless the lamp is placed in a pendant or vertical position. With lamps at an angle and a distributing reflector too much light is directed up. Fig. 213 is a good example of a handsome table lamp which is useful principally for decorative purposes. It has the same shortcomings as all electric table lamps, namely, the inability to throw a large proportion of its light in directions most needed, unless the light is needed on the table near the lamp. It does, however, add considerably to the artistic appearance of a room and the authors do not wish to be understood as condemning artistic ornamental lamps of this kind. When they are used, however, it should be with a full understanding of their inefficiency for all purposes except those mentioned. There are cases where expense is of secondary importance and by equipping decorative lamps with sufficiently high candle power lamps they can be made to do satisfactory useful work. As a general thing an ornamental lamp of this kind might better be provided with a low candle power lamp and used simply for decorative purposes depe...


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Product Details
  • ISBN-13: 9781130117172
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 70
  • Spine Width: 4 mm
  • Width: 189 mm
  • ISBN-10: 1130117170
  • Publisher Date: 01 Mar 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 141 gr

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