March 21, 1900 (Wednesday)
- George C. Hale, Chief of the Kansas City Fire Department and inventor of the Hale tower and the automatic harness, demonstrated the first heat sensitive automatic fire alarm – "When the temperature goes above the maximum fixed for the building, an electric circuit is opened that puts into operation a phonograph which talks into a telephone, telling Fire Headquarters that there is a fire at whatever address the alarm is located."
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Famous quotes containing the word march:
“This, then, is the test we must set for ourselves; not to march alone but to march in such a way that others will wish to join us.”
—Hubert H. Humphrey (1911–1978)