| View Cart ⇗ | Info

“An instrument used chiefly to measure the angular deviation of light rays in passing through a prism, and hence to determine the refractive indices of the substance of which the prism is formed.” &mdashWhitney;, 1889


William Dwight Whitney, PhD, LLD The Century Dictionary: An Encyclopedic Lexicon of the English Language (New York, NY: The Century Co., 1895) 5810


TIFF (full resolution)

5017×2875, 1.2 MiB

Large GIF

1024×586, 117.7 KiB

Medium GIF

640×366, 62.2 KiB

Small GIF

320×183, 22.8 KiB