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Science Museum Group Collection
© The Board of Trustees of the Science Museum

Kymograph, on table, by C.F. Palmer and Co., London, 1925-1935, used by Sir Henry Dale, 1930-1940

The kymograph is a classic tool of laboratory research invented by the German physiologist Carl Ludwig (1816-1895) in 1847. One of its earliest uses was to measure the blood pressure during physiological experiments. A cannula connected to a U-shaped tube filled with mercury was inserted into the artery of an animal. On top of the mercury was a float attached to a pen. As the blood pulsated, the pen recorded the movement on smoked paper wrapped around the metal drum.

The kymograph is said to have transformed experimental physiology as the graphs produced allowed physiologists to see blood pressure on paper, giving them a permanent record of the experiment. The kymograph was later adapted to record muscle contractions and respiration. This kymograph was used by Sir Henry Dale (1875-1968), a English physiologist and pharmacologist.

Details

Category:
Laboratory Medicine
Object Number:
A602430/1
Materials:
apparatus, brass, apparatus, iron and table, wood
Measurements:
large drum: 232 mm,
table: 762 mm
beam: 1200 mm
type:
kymograph
credit:
Medical Research Council