![[Picture: Border with mathematical instruments]](https://www.fromoldbooks.org/Rouam-MuseeArtistiqueVI/pages/306-corner-border-engineering/306-corner-border-engineering-q85-392x500.jpg "[Picture: Border with mathematical instruments]")
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Border with mathematical instruments more
borders, chapterheads, mathematics, scientific instruments, rulers, technology, science, engineering, astrolabes, full-page borders
This chapter head is made of two parts: to the left and top, an L-shaped steel ruler or square, perhaps, with a weight hanging by a string (a pumb-line probably; it may have been a roofing square); under the top part of the ruler, a collection of protractors, a telescope, dividers, and other engineering and mathematical instruments.
The article headed by this picture is about the Roussel Collection: a collection of mathematical instruments. The collection appears to have been made in the eighteenth century; the drawings are attributed to Madamoiselle J. Roussel, which could be a wife or daughter.
Comments:
Added by JuaSaysHi on Sun Jan 27 21:37:41 2019
I think these are astrometrical or navigational instruments, for astrometry or celestial navigation. The leftmost round thing is an astrolabe (see Wikipedia),and I think next to it is either a horary quadrant or maybe an astronomical sextant, and a compass, on top of the dividers.
Added by slave on Sun Jan 27 23:45:44 EST 2019
Thank you for writing! yes, i think you are correct, although the accounts of the collection that i could find refer to the instruments as mathematical, as does the book from which i scanned the picture, so i retained that in the caption; the meaning of the word “mathematical” has changed somewhat since the eighteenth and nineteenth centuries, though.
Thank you for the identifications!