The slide wire 50 cm long is fitted over graduated plate divided in 500 part. The jockey is of superior type and slides on the metal rod. The dial consists of 14 coils connected in series to the slide wire. Terminals for battery, galvanometer and test circuit are provided on the panel.
A basic instrument for performing spectroscopy experiments, designed to give best possible results, mounted on stable cast iron base, protracted scale 150mm is divided on precision machine, vernier reading 1 min., telescope is fitted with 25mm dia. and 178mm focal length achromatic objective, 10x Ramsden eye piece and cross line graticule, collimeter has an adjustable precision slit of 6mm long jaws of non rusting metal, 8cm dia. prism/grating table is adjustable and has engraved ring pattern. Supplied in a beautiful plywood box with prism holder and grating holder
