Most precise, durable and accurate instrument, resolution to 30 seconds of arc with a large degree plate of diameter 200 mm. and longer verniers gives better accuracy and resolution. Fixed degree plate, telescope and prism/grating table rotate independently. Bigger and heavier model so as to provides more stability for delicate optical measurements. Mass 7 kg.
Category: Physics & Electronic Laboratory Apparatus
Cast iron with levelling screws, with vertical and horizontal holes to accept 13 mm. diameter rods, each hole with a clamping screw. Overall length 240 mm. mass approx. 2.5 Kg.
Set of six perspex geometrical shapes, consisting of one each triangle, square, circle, rectangle, hexagon and octagon.
GEOMETRICAL MODELS WOODEN SOLID
A set of 16 or 21 plane and solid geometric shapes. The plain shapes include triangle, rectangle, square, circle, semi circle, figure with five sides, six sides, eight sides, right angle. Solid figures include triangle, rectangle, cylinder, square, cone, square base pyramid, triangle base pyramid, pentagon, hexagon, octagon, sphere and ellipse. Supplied in a polished wooden box.
CUBE SET, WOODEN
Side 10, 20, 25 mm.