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Diasporameter
From the collection of National Museum of American History. Free to download, adapt and use — no permission needed.
About this work
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.
National Museum of American History’s own descriptionSubjects
Credit lineDiasporameter. National Museum of American History. CC0.
