Thompson's cannula for applying silver nitrate to the urethra Thompson's cannula for applying silver nitrate to the urethra
Set of 7 nickel-plated cannulae, numbering 9 to 3, by J. Coxeter, London Set of 7 nickel-plated cannulae
Curved plated metal cannula with double ring-hold, size 13 Curved plated metal cannula with double ring-hold
Oval rubber cannula with metal and wire fitting, in base of case Oval rubber cannula with metal and wire fitting 1860-1910