Note J — PART III PREVENTIVE MEASURES AGAINST INDUSTRIAL POISONING (continued 2)
Thomas Morison Legge translation
Use of Oxygen Cylinder.—Open the valve gradually by tapping the lever key (which must first be extended to its full length) with the wrist, until the oxygen flows in a gentle stream from the mouthpiece into the patient’s mouth. The lips should not be closed round the mouthpiece. The nostrils should be closed during breathing in, and opened during breathing out.
If the teeth are set, close the lips and one nostril. Let the conical end of the mouthpiece slightly enter the other nostril during breathing in, and remove it for breathing out.