What is a micrometer and how does it measure
A micrometer measures tiny thicknesses via a screw spindle moving 1/40 inch per turn and a 25‑part scale for thousandths. Vernier scales allow reading to ten‑thousandths, with examples like newspaper thickness about 0.0035 inch. A micrometer ocular aids reading by magnifying a scale on the object.
MENTIONED IN THIS ARTICLE
Leokum
Riddle Chip Puzzles Readers for Britannica Prize
A reader’s joke describes a potato peeling contest where two men peel 236 and 200, then the punchline hinges on misreading and one. The column invites more riddles and jokes, listing Melinda Faulton of Roanoke Rapids, North Carolina as today’s winner.
MENTIONED IN THIS ARTICLE
Melinda Faulton
Roanoke Rapid
N.C
This Day In History October 2 1967 United Press
On this day in history events include Mohan das Gandhi born in 1869. In 1790 Maj John Andrew was hanged in Tappan for Benedict Arnold treason. In 1889 Latin American nations attended the Pan American Conference in Washington. In 1919 Woodrow Wilson suffered a stroke. In 1960 a Times Square bombing injured several hundred.
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United Press International
Mohandas Gandhi
Maj
John Andrew
Benedict Arnold
Tappan
N. Y
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