Found 3,272 Resources containing: Angles
National Museum of American History
This is a container with brass sides and glass ends, supported on a brass stand. When filled with different liquids, it shows that these liquids refract light in different ways. When the glass ends are set to different angles, it shows that the angle of deviation increases with the refracting angle of the prism. The “J. Duboscq / à Paris” inscription is that of the optical instrument maker, Jules Duboscq (1816-1886).