Perform quantitative spectroscopy experiments using this good quality yet economical spectrometer. Unit is mounted on a stable bas with attached collimator, and rotating telescope platform. Features include a 2.6cm diameter achromatic optical system with a 10x eyepiece and crosshair. A 16cm diameter 360 degrees x 0.5 degrees enclosed graduated circle with a double ended external 0-30' x 1' Vernier, and 2 built-in scale reading magnifiers. An 8cm diameter grating/prism table with an engraved ring pattern. Table has adjustable grating and prism holders. A 6mm slit, opening to 2mm. Wooden storage box, and instructions are included.