Science Art: Fig. 100 (Outside-Spring Indicator) from Steam-engine Theory and Practice by William Ripper, 1922
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This, the text tells me, is an “outside-spring indicator, by Messrs. Elliott Bros.” The spring is not exposed to high temperature, which makes it better for indicating. I’m… Read the rest “Science Art: Fig. 100 (Outside-Spring Indicator) from Steam-engine Theory and Practice by William Ripper, 1922”