<< >>
Alexis-Marie de Rochon (1741-1817) was a French astronomer and physicist who, in 1776, devised a “diasporameter” for measuring the dispersion of prisms of various substances. This unsigned example was probably made in Paris in the mid-nineteenth century.
Ref: Maurice Daumas, Scientific Instruments in the Seventeenth and Eighteenth Centuries (New York, 1972), p. 271.
Lerebours et Secretan, Catalogue et Prix des Instruments (Paris, 1853), pp. 34-35.
Rochon, Receuil des Mémoires sur la Mécanique et de la Physique (Paris, 1783).
Currently not on view
Object Name
dispersion meter
overall: 44 cm x 18 cm; 17 5/16 in x 7 3/32 in
overall: 17 1/2 in x 7 in; 44.45 cm x 17.78 cm
ID Number
catalog number
accession number
See more items in
Medicine and Science: Physical Sciences
Data Source
National Museum of American History
Nominate this object for photography.   

Our collection database is a work in progress. We may update this record based on further research and review. Learn more about our approach to sharing our collection online.

If you would like to know how you can use content on this page, see the Smithsonian's Terms of Use. If you need to request an image for publication or other use, please visit Rights and Reproductions.


Add a comment about this object