Woodhouse Braine's modification of Ormesby's inhaler for ether anaesthesia, English, 1877-1930 Woodhouse Braine's modification of Ormesby's inhaler for ether anaesthesia 1877-1930
Medical oxygen valve, from the laboratory at B.P. Chemical Ltd., (Sandbach Works), by Siebe, Gorman and Co. Ltd., English, 1935-1955 Medical oxygen valve 1935-1955
