This simple instrument—consisting of a brass cylinder that supports an eyepiece on a horizontal arm, a circular stage, and a sub-stage mirror—stands on and fits into a wooden box small enough to fit in one’s pocket. François-Vincent Raspail (1794-1878), a French scientist and politician, designed the form in the 1820s. In this example, the stage and mirror are missing. The “DELEUIL” inscription refers to an important instrument house in Paris that was established by Louis Joseph Deleuil (1805-1862) and continued by his son, Jean Adrien Deleuil (1825-1894).
Currently not on view
Object Name
date made
19th century
Physical Description
glass (overall material)
wood (overall material)
brass (overall material)
overall: 5 cm x 10.5 cm x 20.4 cm; 1 15/16 in x 4 1/8 in x 8 1/16 in
place made
France: Île-de-France, Paris
ID Number
accession number
catalog number
Science & Scientific Instruments
Science & Mathematics
See more items in
Medicine and Science: Medicine
Data Source
National Museum of American History, Kenneth E. Behring Center
Additional Media

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