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In the article by Drs. Arthur D. Hirschfelder and Victor G. Haury entitled "Variations in Magnesium and Potassium Associated with Essential Epilepsy," in the July issue (Arch. Neurol. & Psychiat. 40:66, 1938), the word "unfiltrable" in the third line of the paragraph bearing the side heading "Normal Persons" on page 78 should read "ultrafiltrable."
CORRECTIONS. Arch NeurPsych. 1939;41(2):378. doi:10.1001/archneurpsyc.1939.02270140164017