A rare dark-field stage microscope by Nachet called by himself “ultramicroscopie”. The stage bears the serial number “75” and its signed “Nachet”. It is complete and in fine condition, preserved in its original box, also signed.
“Dark-field transmission or ultramicroscopy illumination “: […] Objects whose dimensions are all smaller than the resolution limit are invisible in bright-field lighting. But the existence of these “ultramicroscopic” objects can be perceived by taking advantage of diffraction. In the dark-field microscope, or ultramicroscope, only the condenser or stage are different from that the other microscope”.
Both holes in the stage are later. There is two screws, certainly used in the past to fix the stage on a microscope.
A rare Nachet accessory.
Box : 10,5×11 cm
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Established by Alexandre Piffault in 2014 and based in Paris at 5 rue de Condé, 75006, very close to Odéon, Le Zograscope specializes in antique and rare books in Science, Medicine and Technology, and rare antique instruments in the same fields. We have especially a strong interest in early and continental microscopy, early and special mathematical/drawing instruments, medical and surgical instrument, and rare technology.
Personnal website : https://www.lezograscope.com/