refractometer

/ree-frak-tom-i-ter/US // ˌri frækˈtɒm ɪ tər //UK // (ˌriːfrækˈtɒmɪtə) //

折射仪,折射计,折光仪,折射率仪

Definitions

n.名词 noun

1
Optics.
- : an instrument for determining the refractive index of a substance.

The index of refraction of the above solution may be taken with the Zeiss immersion refractometer or with the Abbe refractometer.
The Herbert-Smith refractometer is there described fully, its principle is explained and directions for using it are given.
Lacking a refractometer, the widely differing specific gravities of the two minerals would easily serve to distinguish them.