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February 25, 1956


Author Affiliations

Director, Industrial Hygiene National Safety Council 425 N. Michigan Ave. Chicago 11,

JAMA. 1956;160(8):703. doi:10.1001/jama.1956.02960430093022

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To the Editor:—  I feel that some comment should be made about the letter by Frank Cole, M.D., in the Jan. 14, 1955, issue, page 135, of The Journal, because the hazard of explosion, which he points out, seems to me to be minimal and the real hazard, which was involved in this incident, was an imminent hazard to the life of his patient from electric shock. If he was passing sufficient current to ground to burn the rubber on a breathing tube, it seems certain that he must have been using electrical equipment at the ordinary house current potential and with seriously defective insulation. The recommendations of the National Fire Protection Association pamphlet no. 56 provide protection against this type of hazard in three ways. 1. No solid metallic connection to ground is recommended or contemplated, so that the patient and the operating personnel are protected from shocks of

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