. Science of railways . Fig. Corrugated Spring, STAR NON-CORROSIVE AND NON-SETTINGLOCOMOTIVE STEAM GAUGES. Two styles of these gauges are illustrated by and i5. The former (the standard) knownas the double spring Bourdon type and Fig. 15shows the doublespring Lane type. Each style of gaugeis fitted with their non-corrosive movementand corrugated springtubes. It is a well known factthat in all branchesof mechanical engi-neering where light- DeSS, rigidity and star DouWe-SpringGauie—Bourdon LOCOMOTIVE APPLIANCES. 203

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