Cooke and Wheatstone two-needle telegraph, 1844.

Cooke and Wheatstone two-needle telegraph, 1844.

'The Magnetic Needle Telegraph, c 1843.

Cooke and Wheatstone two-needle telegraph, 1844.

Cooke and Wheatstone two-needle telegraph, 1844.

The steam engine of Sir Hiram Maxim's flying machine, 1894.

River Thames frozen, London, winter 1894-1895.

Sir Alan Cobham, English aviator, c 1933.

Sir William Ramsay and Lord Rayleigh, 1894.

Metal acupuncture pins, Chinese.

Netsuke inscribed with acupuncture meridians, Japanese, 18th-19th century.

Bronze acupuncture figure, Chinese, 16th-18th century.