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Figure 42.Rotating compound microscope, signed “Arthur Chevalier, Palais Royal 158, Paris” (see Figure 36-H). A variety of early French microscopes have stages and upper bodies that rotate, which allows views of the specimen with different substage illumination angles without touching the specimen or the mirror. Figure 41.A different pattern of Chevalier drum/cylindrical microscope. Additionally it is signed “Arthur Chevalier, Opticien, Fils et Sucr. The arm differs from the main one illustrated in the 1864 and 1865 editions of “Etude de Micrographe”; thus, at least two types of this instrument were produced.

• Additionally it is signed “Arthur Chevalier, Opticien, Fils et Sucr.
• It is very like the microscopes shown in Figure 5, above.
• Victor Ducray-Chevallier.
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The list also shows home elevators the business formerly owned by J.G.A. Chevallier’s son, P.M.A. Chevallier, which was at that time owned by Adélaïde Queslin, and two minor opticians surnamed “Chevalier”. Pelletan wrote that the firm tried to cover up Arthur’s death from their customers, a reasonable approach for a business that did not have a head. He described the heirs as “two young and charming girls, almost children”. Thus, Selligue-type microscopes by the Chevaliers could be dated to 1824, and Euler-type instruments to after March, 1825. Vincent evidently continued to make Euler-type microscopes in to the 1830s .
Chevalier aîné” was awarded a Citation for “divers instrumens d’optique exécutés avec adresse”. Explanation of these “various optical instruments” was not provided.

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Chevalier’s device was unique in having a prism in the hole, with one face of the prism being convex. It was reported to produce vivid, sharp images, and lacked the disadvantages of a mirror, which had previously been used for these devices. Charles left his father’s house and business in 1833, and established another business at 163 Palais Royal. He occasionally stated that this shop was on Galerie de Valois within the Palace.

Figure 53.A folding Coddington-type magnifier, signed “Arthur Chevalier, Palais-Royale”. Adapted for nonprofit, educational purposes from an internet auction site. Figure 44.Simple microscope (see Figure 37-A), signed “Dr. In 1870, Arthur was offered an honorary doctoral degree from the University of Rostock. From then onward, he used the title “Doctor” for his signature on microscopes and other equipment.

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The arm and the placement on the wooden case will vary from the microscope shown in Figure 9. The first “selon Euler” achromatic microscope was presented by Vincent Chevalier to the Academy of Sciences on March 30, 1825. A detailed history of the Chevalier family and their businesses is presented below, following illustrations and descriptions of these microscopes. From 1841 onward, Charles advertised himself as “fils et seul successeur de Vincent Chevalier” (“son and sole successor of Vincent Chevalier”), while remaining at Palais Royale. An illustrated essay on Richebourg and his works will soon be presented here.

• A detailed history of the Chevalier family and their businesses is presented below, following illustrations and descriptions of these microscopes.
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• Note, however, that the condenser for viewing opaque specimens, initially a thick prism, is currently a biconvex “bull’s-eye” lens.
• Figure 42.Rotating compound microscope, signed “Arthur Chevalier, Palais Royal 158, Paris” (see Figure 36-H).
• In 1823, Vincent and his son, Charles, were enlisted by an optical engineer, Alexandre François Gilles (better known by the nickname “Selligue”) to produce an achromatic microscope to Selligue’s specifications.

Note, however, that the condenser for viewing opaque specimens, initially a thick prism, is currently a biconvex “bull’s-eye” lens. Adapted for nonprofit, educational purposes from “The Catalogue of the Billings Microscope Collection”, Fig. Toward the end of 1823, the Chevaliers were enlisted by Alexandre François Gilles (a.k.a. “Selligue”) to produce an achromatic microscope to his design. The first of the was presented to the Academy of Sciences of Paris in August, 1824.
a while in the army, Louis Chevalier worked for a number of years with other optical businesses. In 1818, Louis established his own optical shop at 65 Quai de l’Horloge. After his death, the business continued as Louis Chevalier et Fils, at 25 Quai de l’Horloge. There do not appear to have been any business ties between Louis and either Vincent or Charles Chevalier. Figure 52.The Chevaliers also produced simple magnifiers, like the example on the left, signed “Arthur Chevalier, Palais Royale”. The image on the proper is from the 1865 edition of Arthur’s “Le Etudiante Micrographe”,. The left image was adapted for nonprofit, educational purposes from Brian Bracegirdle “Science Museum, London”.

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A reliable judge, von Heurck, has recently given prominence to Chevalier’s optical productions. Unfortunately, I have not as yet seen anything from this establishment”.
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