Made of plated steel and glas. The instrument consists of a lancet for taking blood samples, a specimen tube and case, slides, a spreader, glas pipettes, a mouthpiece for sucking the sample into the pipette, and a holder with glas tinted correct colour for comparison. A British neurologist, William Gowers (1845-1915) invented the haemoglobinometer in 1875. It provided a rapid test for the amount of haemoglobin in blood by comparing its colour with a reference tube.
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