LOP-PLIT-0086

This instrument whilst robust enough for individual student use in also intended for more advanced work. The

general finish of the apparatus is similar to that of the intermediate model.

The instrument is

mounted on a baseboard which fits into a polished hardwood case.

Scale, the 150 mm. diameter circle is fixed, and the table and
telescope

movements are completely independent of each other. Both
movements can be read to 30 sec. of arc by means of double ended
verniers. Both rotations have

fine adjustment screws, and release of a
clamping screw enables coarse adjustment to be made by hand.

Collimator, mounted on fixed and pillar and

fitted with 178 mm. focus achromatic objective, 32 mm. clear aperture.





Telescope, mounted on moveable pillar and fitted with 178 mm. focus

achromatic objective, 32 mm. clear aperture. Also fitted is an x15 Ramsden eyepiece and a glass cross line graticule.







Prism

table, the table is marked with lines to assist placing the prism with respect to the table levelling screws, and has interchangeable clamping units for the

prism and a diffraction grating.