THE EFFECT OF GAS ON THE EYES.
The azure of the sky and the verdure of, the. fiedds are the colours to which the organ of vision is naturally adapted, and which it will endure with the most ease. The flame of a good lamp is better than the flare of gas. Gas is intermittent and flickering, which produces constant contractions and dilations of the pupils, which tax the eyes injuriously. The only way to overcome such results is to conduct gas to a stand and shade the eyes. By placing light blue tissue-paper around the light the deficiency of the soft violet rays, so comfortable to the eyes, will be overcome. By allowing it to pass through a bluish medium it approaches nearer the light of day.
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https://paperspast.natlib.govt.nz/newspapers/THS19170108.2.8.1
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Thames Star, Volume LVIII, Issue 10287, 8 January 1917, Page 3
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128THE EFFECT OF GAS ON THE EYES. Thames Star, Volume LVIII, Issue 10287, 8 January 1917, Page 3
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