Arthur Chevalier (1830 -1874)
Louis Marie Arthur Chevalier was Charles' son. He continued in 158, Palays Royal, Paris, his father work, but with lower results, because the horizontal microscope had by then monopolized the markets and the other microscope models made by Arthur suffered of the strong competition from the other European makers. In 1860's hundreds of instruments were in catalogue, with a staff of 15 workmen and employees in the Paris workshop assigned to distribution and forwarding, while about 60 skilled craftsmen worked to the components, many of them in the European countries.
Arthur Chevalier published "L'Etudiant micrographe" and in 1863 "L'Art de l'opticien et ses rapports avec la construction et l'application des lunettes". He improved medical equipment and production method. After Arthur, the firm declined and probably closed in 1889.

Bibliografy
C. Chevalier, Des Microscopes et de leur usage, Paris, 1839
A. Chevalier, L'etudiant micrographe, Paris, 1882
G. Faure, Storia del microscopio, Roma, 1945,
G. L'E. Turner, The great age of the microscope, 1989, ISBN 0-85274-020-4
G- L'E. Turner, Microscopi-Guida per il collezionista, Christie's International Collectors Series, Silvana Editoriale
R. G. W. Anderson, J. Burnett and B. Gee, Handlist of Scientific Instrument-Makers' Trade Catalogues 1600-1914, National Museums of Scotland Information Series No. 8, ISSN 0952-7737