f. The wires that are fused into glass in incandescent light bulbs must have the same coefficient of expansion as the glass. Platinum has therefore been used for this purpose. (See table above.)
Fig. 129.—Metallic thermometer.
Important Topics
1. Expansion of Liquids; peculiarities. Anomalous expansion of water and its results.
2. Expansion of solids; peculiarities, applications.
3. Coefficient of linear expansion.
4. Coefficient of cubical expansion.