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Haemacytometer, Paris, France, 1874

Science Museum, London

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Free to use with attribution CC BYCredit: Science Museum, London
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This early haemacytometer is a simple device. It consists of a microscope slide marked into squares. A blood sample was diluted and placed on the slide. The red cells in the squares are then counted through a microscope. An increase or decrease in blood cells in the blood can indicate disease within the body. A low level of red blood cells is called anemia. A high level of red blood cells is called Polycythemia. The haemacytometer was devised by French physiologist Louis-Charles Malassez. This example is the original instrument described by Malassez. It was made by Verick in Paris. maker: Verick Place made: Paris, Ville de Paris, Île-de-France, France



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Haemacytometer, Paris, France, 1874. Credit: Science Museum, London. CC BY


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