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| 1 |
MAGNIFIER, READING GLASS
In unbreakable plastic mount with handle,
in different beautiful colours
Cat No 1968/1 |
Dia. 40mm |
£2.08
ea. |
Cat No 1968/2 |
Dia. 50mm |
£2.60
ea. |
Cat No 1968/3 |
Dia. 60mm |
£2.60
ea. |
Cat No 1968/4 |
Dia. 75mm |
£2.60
ea. |
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| 2 |
LENSES, SET OF SIX
50mm dia. with ground and polished faces
and ground edges.
One each of the following typical shapes;
Double convex, plano-convex, converging concave-convex, diverging
concave-convex, double concave, plano-concave.
Supplied in velvet-lined box (wooden box optional)
Cat No 2027 |
|
£13.68
set |
Cat No 2027/1 |
As above but 75mm dia. |
£14.83
set |
Cat No 2027/2 |
As above but 38mm dia. |
£10.27
set |
|
| 3 |
LENS HOLDER
Wooden, to take lenses or mirrors up to 75mm
dia. 100mm high with a V-slot to hold convex or concave lenses,
mounted on 100 x 50mm rectangular base. An index mark is engraved
on each end of the base.
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| 4 |
SET OF ACRYLIC PLASTIC BLOCKS
Clear acrylic plastic blocks 20mm thick with
bottom surface finished in white to show ray tracks and all other
surfaces fully polished. All packed in velvet lined box.
The set includes seven blocks described as follows:
| Rectangle |
75 x 50mm |
| Triangle |
90° x 45° x 45°, 75mm hypotenuse |
| Triangle |
60° x 60° x 60°, 57mm side |
| Semi-circle |
75mm diameter |
| Bi-convex |
75mm long curved faces, 115mm radius |
| Bi-convex |
75mm long curved faces, 145mm radius |
| Bi-concave |
75mm long curved faces, 115 radius |
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