A good cased Hayem’s instrument signed by Nachet which serve to count the blood cells, the Hemocytometer.
The case preserves the optical instrument to count the blood complete of its optical part and its Hayem glass plate, a pipette for the blood signed Nachet and another for serum, a container (of which its glass part is missing), a tirrer and a set of special slides glass serving to cover the cell.
Despite a little lack of leather at the case, the
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