American Educational Intermediate Advanced Spectrometer (7-1925)Designed for easy set up and use Intermediate to Advanced! Also includes instruction manual Advanced Spectrometer Designed for easy set up and use. This specrometer's sturdy iron base incorporates a 20cm diameter divided table with highly visible etched graduations and a Vernier scale that can be read to a resolution of 1 minute of arc. The revolving 7cm diameter prism support rotates 360 degrees and has a height adjustment of 2cm, thereby