A very rare Cornu-type stage micrometer by Duboscq-Pellin for measuring the line of the ultraviolet spectrum, circa 1890
450
Dimensions
Case : 26x8x7 cm
Circa
1890
Country of manufacture
France
Description
An excellent and quite unusual example of the Alfred Cornu-type high precision stage micromemeter signed by Duboscq and Pellin for the measurement of photographic prints and in particular for the measurement of the line distance in spectroscopic photographs of the ultraviolet spectrum.
“Micromètre à chariot de M. Cornu, pour la mesure des épreuves photographiques et en particulier pour la mesure de la distance des raies dans les photographies spectroscopiques du spectre ultra-violet.
Cet appareil se place et se fixe sur la platine de divers microscopes, une vis micromètrique au 1/2 millimètre, actionnée par un tambour divisé en 100 parties, permet d’évaluer le 1/200 de millimètre.” (in the Duboscq-Pellin catalogue from 1889)
This is the very rare large modèle for measuring 90 millimeters.
Preserved in its orignal case.
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Dealer information
Le Zograscope
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/
