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A rare rectangular graphometer by Gourdin, dated 1781

Rectangular graphometer dated 1781 by Pierre Gourdin. An unusual shape for an 18th-century French brass graphometer. It is signed and dated “Gourdin au Quart de cercle à Paris 1781.” This graphometer is rectangular, with two water levels, two fixed sights, and an rotable alidade with two sights. On the back, it bears no trace for a ball joint or a support. It was therefore used directly on the planchette or perhaps attached to the board from one side empty. Thus, the two levels were Read More...

Rochette Père, Paris, Rococo-styled Ormolu microscope employing Martin’s optics

There is a blurry signature on the brass plate attached to the wooden baseplate:Rochette Quai de l’Horloge ParisAt this address, two manufacturers, a father and son, operated with the names Rochette Père and Rochette Jeune. Gaspard Rochette (1754–1822) is Rochette Père, while Rochette Jeune refers to Jean Rochette (fl. 1817-1860), who worked in the first half of the 19th century. Although Jean Rochette signed several microscopes, Gaspard Rochette is not known for making optical instruments. The Rococo style and Read More...

4.5 inch sector by Chapotot, circa 1700.

Rare 4.5″ French sector by ‘Chapotot, Paris,maker of optical and mathematical instruments. Worked in Paris 1670–1700, at Quai de l’Horloge du Palais à la Sphère. He was an apprentice to Guillaume Ménard and appointed Master of the Corporation des Fondeurs. He produced many types of instruments, including sundials, surveying instruments, mathematical instruments, and simple microscopes. His son Jean continued the business until about 1721. Read More...

Rare set of three globe and spheres signed Delamarche dated 1801

Rare set of 3 globes composed by : – Terrestrial Globe with the cartouches: « in Paris chez Delamarche, rue du foin Saint-Jacques at the College of Maitre Gervais – 1801 ». « Globe terrestre d’après les découvertes du Capitaine Cook et augmenté de celles du capitaine Lapérouse. Par CF Delamarche géographe successeur de Vaugondy 1801 ». – Ptolemaic Armillary Sphere signed in a cartouche on the Earth: « Globe terrestre à Paris chez Delamarche, rue du foin Saint-Jacques au Collège de Maitre Read More...

Imposing terrestrial globe by Bertaux in Paris made circa 1880/1890

Imposing large library terrestrial globe with inscription and signature in the cartouche: “Globe terrestre d’après les découvertes les plus récentes. Published by E. Bertaux, rue Serpente à Paris”. On its original mahogany tripod base. Note: Bertaux was the successor of Delamarche. Dimensions: height of 70 cm x diameter of 54 cm. France made circa 1880/1890.       Read More...

Imposing hourglass painted with the French colors made during the French Revolution

Imposing wooden hourglass painted in the colours of France (blue, white, red). The following words are inscribed on the two circular bases: ‘LIBERTY – EQUALITY – PEACE TO THE PEOPLES – WAR ON TYRANTS’. Six square columns. A flask with two bulbs held in place by a fabric and rope seal. Beige-coloured silica sand. Dimensions: height 32.5 cm x diameter 16 cm. France made during the French Revolution period.   Read More...

~VERY GOOD RASPAIL’S SIMPLE CHEMICAL MICROSCOPE~

Signed “Deleuil” to the pillar which mounts to one side of the box in a square slot with thumb screw and supports a gimballed mirror (90%), rackwork adjusted stage and objective arm with thumb screw horizontal adjustment, the fitted drawer houses 3 objectives and additional stage accessories (separate glass and brass stage inserts). Max. height when racked 20 cm. (15 cm. packed in drawer). Two matching pin probes and brass tweezers complete the microscope. Mahogany case measures 20 x Read More...

An early mathematical set by Butterfield, circa 1700

An early example of a mathematical set by Butterfield in its black leather case in the style square illustrated in the Nicolas Bion’s book first published in 1709. The case/étui of later examples of roundes shape, not like the present one. The mathematical brass set preserves : -A brass sector signed “Buterfield” -A brass protractor signed “Buterfield” -A brass folding square signed “Buterfield” The three signatures are homogeneous et of nice quality with decorations. -A large pair of dividers with sharp points ; -A small pair Read More...

Laënnec type Pediatric Stethoscope, C 1880

Laennec-type paediatric rosewood monaural stethoscope of c. 1880. There was no “Laennec pediatric stethoscope”; Laënnec invented the first stethoscope in 1816, which was a wooden tube designed for general auscultation, not specifically for children. Pediatric stethoscopes, a later development, have smaller chest pieces and are designed for a narrow focus on the smaller anatomy and specific lung and heart sounds of infants and children. Diameter: 5,8 cm Height: 12 cm. Read More...

Lost/Stolen Grangeret surgical set

Dear colleagues, dear collectors,   This important illustrated Grangeret surgical set was recently lost/stolen during its travels through USPS. It was part of a medical collection I offered for sale in february, see here : https://lezograscope.cdn.bibliopolis.com/images/upload/collection-dun-medecin-de-campagne-pv.pdf It appears in July in the Ebay US, see here : https://www.ebay.com/itm/336081321548, but me and the buyer we cannot buy it again. So, if someone did get the set or knows something about it, please contact me. thank you, Alexandre – Le Zograscope +33688778366   Read More...

Miner Compass By Ingénieur Chevallier Place Du Pont Neuf 13 Paris C. 1842 in has portable case

Beautiful mine compass in its original box, transport shape, worn on the belt.  The compass is signed Maison de l’Ingénieur Chevallier Opticien Place du Pont Neuf 15 Paris.  The store moved to 15, place du Pont-Neuf later in 1842. The attribution of this date is based on Chevallier’s catalog of 1842, which provided this address. A notice published in March 1843 reminded the public of the store’s move, suggesting it may have occurred in late 1842.  Chevallier’s catalog indicates that the move Read More...

French perpetual calendar with original description c. 1877

A French Perpetual calendar from circa 1877 with five static circles and four moving circles. At the back of the perpetual calendar a handwritten explanation is attached with a step-by-step guide, it moves the reader through seasonal and lunar phases such as easter, the phases of the moon and the lunar phases. It is carefully made of a decorated brass plate with four rotatable circles an in a wooden frame. At the center of the brass plate a rotatable globe Read More...