Hewitt's modification of Clover's portable ether inhaler, in case, with two bottles, made by Thackray, Leeds, 1901-1920 Hewitt's modification of Clover's portable ether inhaler 1902-1920
Hewitt's modification of Clover's portable ether inhaler, in case, with glass bottle made by Thackray, Leeds, 1901-1920 Hewitt's modification of Clover's portable ether inhaler 1902-1920
Hewitt's modification of Clover's portable ether inhaler, made by Thackray, Leeds, 1901-1920 Hewitt's modification of Clover's portable ether inhaler 1902-1920