Haemodynamometer, London, England, 1895-1905
The degree of pressure of blood in an artery or vein can be measured using a haemodynamometer. It was invented by British physician George Oliver (1841-1915). It works by a thin rubber pad filled with glycerine and water compressing the pulse. Blood pressure was then indicated on the dial. This example was made in London by instrument maker Hawksley and Sons Limited.
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Glossary: measuring device - instrument
Device used to ascertain the value or extent of an object, with regard to size, volume, mass, position or comparison to a standard amount or property.