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In the report "Eveready Two-Bed Carbon Arc Lamp, Model A-22, Acceptable," published in The Journal, Nov. 7, 1936, page 1561, a transposition of figures recorded the efficiency of the transformer at 49 per cent. The efficiency of the transformer should have read 94 per cent.
CORRECTION. JAMA. 1937;108(3):205. doi:10.1001/jama.1937.02780030043011
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