Various Bunsen burners, 1855-1910.

'How to build a two valve set', No 7, Godfrey Philips cigarette card, 1925.

Set of tracheotomy instruments, c 1871-1900.

Emergency tracheotomy set, 1941.

Set of tracheotomy instruments, c 1871-1900.

Tracheotomy set, c 1940.

Set of tracheotomy instruments, mid 19th century.

Double focus X-ray tube, 1896.

Sobell T90 tabletop television receiver, 1950.

Hero's aeolipile and steam boiler, 1st century BC.

Hero's aeolipile and steam boiler, 1st century BC.

Disposable syringe, 2000.