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were removed to a mezzanine gallery. Thirty per cent of the area of the store was reclaimed for business purposes.
    In apartment buildings the introduction of Luxfer Prisms in the entire openings will at once be seen to be desirable, for the reason that where these apartment buildings are crowded together, dressing rooms and bath rooms oftentimes open directly opposite, and privacy is not secured even by the use of dark shades keeping out the light. Where Luxfer Prisms have been installed, rooms where it was previously necessary to use dark shades and burn lights are now filled with beautiful daylight without obstruction, securing perfect privacy.
    The benefits to health to be derived from the reduction of gas burning and consequent fumes, can hardly be overestimated. Luxfer Prisms, without any cost of maintenance, displace gas and electric lights, and in their place give pure, healthful light. It will be found that in buildings from 150 to 200 feet deep, in the middle of the block, where light shafts are used, these shafts can be entirely dispensed with by the use of Luxfer Prisms in the front and rear. In a building recently finished the plans originally showed a light shaft in the middle of the building. When the architects' attention was brought to Luxfer Prisms, they omitted this. These prisms were introduced in front and rear elevation, and the light thus secured throughout the seven stories is more than ten times as bright as it would have been had the shafts been built as originally planned. Another practical advantage in this case is the additional income paying floor space of forty-six hundred square feet, which otherwise could not have been used. The cost of the building was reduced, the expense of the Luxfer Prisms used being substantially less than the estimated cost of the walls to enclose the light shaft.
    It will be found that the large light courts heretofore designed may be much reduced in size when Luxfer Prisms are used. For example: One court in a large Chicago building, built sixty-seven feet square, might have been reduced to forty-five feet square had Luxfer Prisms been known when the design was made, and yet the rooms deriving light from that court would all of them be very much better lighted if equipped with Luxfer Prisms on the smaller shaft than
  Pocket Hand-Book of Electro-Glazed Luxfer Prisms - Page 8