A quite large and massive brass graphometer signed “Baradelle a Paris”.
According with the style, so the datation of the insturment (1780s’), the instrumentmaker can be Nicolas Alexandre Baradelle, the first son of Jacques Baradelle or his brother Jean-Louis Jacques Baradelle or “Baradelle fils” who is Nicolas-Eloi Baradelle.
The graphometer measures 36 cm lenght by 18,5 height. The largest sights measures 7,5 cm height. This is a large and heavy instrument of a quite unusual size.
The graphometer is engraved with a large semi-circular double scale of 0 to 180 degrees and 180 to 0 degrees. In its center, a very large silvered compass with its original needle. The instrument is preserved complete with its original ball-joint.
Some old traces of cleaning, otherwise there is no restoration and the instrument works perfectly.
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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.