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1627. Calcite/Ouartze
Prisms
Equilateral, with optics axis parallel to refracting edge size
12.5x12.5 mm: 18x18 mm, 25x25 mm. |
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1628. Calcite/Ouartze
Prisms Equilateral, but with optic axis parallel to
refracting base adjusted to when minimum deviation Size 12.5x12.5
mm; 18x18mm. 25x25 mm. |
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1629. Fresnel
Biprisms Optically Worked. made from crown glass packed in
box 40x32 mm, 50x40 mm. |
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1630.
Micrometer Eye Piece Occular graduation scale 10 mm. divided
into 100 parts. |
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1631. Objective Micrometer
(Stage Micrometer) scale 10 mm. divided into 100 parts. |
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1632. Sodium
Vapour Lamp with Vacuum Jacket.
35 Watts & 55 Watts. |
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1633.
Transformer Grid Leak for Sodium Vapour Lamp. |
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1634. Reading
Telescope
Designed for general laboratory work. The Telescope is mounted on
robust steel pillar 18" long fitted on heavy metal base with
levelling screws. An adjustable ring is provided to stop the
carriage from falling down abruptly. with the help of two micrometer
screws the telescope can be precisely positioned in the Vertical or
Horizontal planes. A scale-holder is provided for holding the scale
for Galvanometer readings.
Optics: Finest Objective; fully achromatic, Ramsden xl 0 Eyepiece.
Objective : Achromatic lense of 25 mm. x 175 mm.
Focussing: Rack and pinion. Complete with perspex scale. |
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1635. Reading Telescope as above
but Aluminium pillar. |
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1636. Reading
Telescope Designed for general laboratory work.
The telescope is mounted on a 1.25 cm. dia pillar. 45cm. long fitted
on a heavy tripod stand. and having Rack and Pinion focussing.
Optics fully achromatic and Ramsden 10x Eye piece.
Objective 25 mm dia Focussing from 1 meter to infinity Complete but
without scale & scale holder. |
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1637. Scale made of perspex.
Milky or Opal inverted figures. |
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