Fig. 4

‘Our introduced face mask and forehead bandage’ and ‘face mask for person with long hair’ from: Kirschner, M. Allgemeine und Spezielle Chirurgische Operationslehre Bd 1, Julius Springer, Berlin, 1927 S. 222, Repro Moll- Keyn, with kind permission. At this time, it was not common covering the nose with the cloth-made mask