sounds were caused by rapid changes of temperature, inches and a half in diameter. The light requires 40 horse producivg corresponding changes of shape and volume in power to maintain it. , the bodies impinged upon by the beam. But if this be the ‘case, and if gases and vapors really absorb radiant… … Dimensions the surface. eae Among gases tried, nitrous oxide and illuminating gas -——|__—__—_--—_ burners. ELECTRICAL FIRE INDICATOR. ‘yielded the loudest sounds. Among vapors, water and sul- + | — |Total.) + - a ae et ee ee base tet yh. | vised and constructed, but the one represented in the…
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