. The principles of physics. Fig. 205. Fie. 206. When heated above the normal temperature, the brass, which is moreexpansible, will be on the convex side; when cooled below the normaltemperature, it will be on the concave side, since it contracts morerapidly than iron. Metallic thermometers now in common use (Fig. 205) are con-structed on this principle. They contain a compound ribbon ofmetal (Fig. 206) wound into a spiral, one end of which a is fixed

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectphysics, bookyear1895