Read by two opposite verniers reading to one minute of the arc. The objectives used in telescope and collimators are achromatic and provided with rack and pinion focusing arrangement. Telescope arm and prism table are provided with fine and coarse adjustment. The prism table is provided with three leveling screws
and is engraved with concentric ring and lines.
The scale and verniers are of stainless steel and are machine divided. Cover plate protects the scale from dust and carries two transparent windows for verniers. The instrument is finished
in pleasing and smooth duco colour and other necessary parts are chromium plated.
With prism clamping device and diffraction grating stand in polished wooden case:
a) 5 dia circle reading one minute ,
b) 6 dia circle reading one minute,
c) 6 dia circle reading 30 seconds,
d) 7 dia circle reading 30 seconds,
e) 9 die circle reading 30 seconds,
f) 10 dia circle reading 30 seconds
1&1/2 meter long consists of two rods
on heavy cast iron feets with leveling screws with four
heavy riders two sliders have liter motion with lens
holder &two needless.
(a) OPTICAL BENCH: Same as above but both
rods of steel C.P.
(b) OPTICAL BENCH: Same as above but both
brass covered pipe inside steel rods.
(c) OPTICAL BENCH: Same as above but both
stainless steel rods.
With horizontal and vertical scales. The bed is of cast iron and accurately machined. The horizontal carriage is machined and inters ground on the guide ways of the horizontal bed. The carriage is fitted with vertical brass pillar carrying a microscope tube on a ground fitted vertical carriage. The base is fitting with two leveling screws Horizontal scale is 20cms and vertical 15cms. Long. Both the horizontal scale and vertical carriages are provided with slow motions, which travels app. 3cms in one traverse. Microscope tube is provided with rack & pinion. A milk white Perspex platform is provided on the horizontal bed. Vernier constant 0.001cms. Complete in well-polished wooden case. Having stainless steel scale.
