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'Freezing' freckles off with carbon dioxide was popular in the Thirties. While it was applied, patients eyes were covered with airtight plugs and their nostrils filled in for protection. They had to breathe through a tube
Mask used for radium treatment of cancer of the head and neck. These masks were used in the 1920’s and were custom made for each patient.
Legitimate form of artificial respiration for babies not breathing at birth. A Text-Book on Practical Obstetrics comprising Pregnancy, Labor, and the Puerperal State, and Obstetric Surgery, 1897. Can't help but wonder what our 'enlightened' medical techniques will look like 100 years from now...