This goniometer is used for exact measurement of optical data on prisms. 
It can also be used as a spectroscope for qualitative examination and measurement 
of emission and absorption spectra.

* 프리즘 위 광학 데이터의 정확한 측정, 정성 실험용 분광기, 방사되거나 흡수되는 
  스펨트럼의 측정.
* Inspection telescope : with combined coarse and fine drives, infinitely variable, 
  cross-hairs, eyepiece vernier accuracy, 1 minute of arc objective : 18mm/160mm
* Slit tube : Symmetric precision slit of hardened steel
              ocular : 18mm/160mm
* Prism : Flint glass (60o)
          Dispersion angle C-F=2o
          base length 33mm, height 22mm
* Dividing circle 360。 : Scale divisions 0.5o