J. A. Ewing may refer to:
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James Alfred Ewing
Sir James Alfred Ewing MInstitCE (27 March 1855 − 7 January 1935) was a Scottish physicist and engineer, best known for his work on the magnetic properties of metals and, in particular, for his discovery of, and coinage of the word, '' h ...
(1855–1935), Scottish physicist and engineer
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James Arthur Ewing (born 1916), 40th Governor of American Samoa
{{hndis, Ewing, J. A.