Inventors at Work, with Chapters on Discovery — CHAPTER VII FORM—Continued. LIGHT ECONOMIZED BY RIGHTLY SHAPED GLASS. HEAT SAVED BY WELL DESIGNED CONVEYORS AND RADIATOR

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Inventors at Work, with Chapters on Discovery CHAPTER VII FORM—Continued. LIGHT ECONOMIZED BY RIGHTLY SHAPED GLASS. HEAT SAVED BY WELL DESIGNED CONVEYORS AND RADIATOR · ch 36/364

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