Gas bag from apparatus for nitrous oxide anaesthesia, 1871-1930 Gas bag from apparatus for nitrous oxide anaesthesia 1871-1930
Stopcock and gas bag from apparatus for nitrous oxide anaesthesia, 1871-1930 Stopcock and gas bag for anaesthesia 1871-1930
Stopcock from apparatus for nitrous oxide anaesthesia, 1871-1930 Stopcock from apparatus for nitrous oxide anaesthesia 1871-1930