1619. Spectrometer Student a low cost but accurate prism and grating holders can be attached easily to the 75mm diameter table Telescope vernier reading to 0.1°
Suitable for many quantitative light experiments. Reading to 0.1° fine adjustment fitting for telescope.
The base, integral with the collimator tube support, carries the swinging telescope arm pivoted on a bearing with spring loaded end thrust plates; this type of bearing eliminates any slack which would otherwise develop with wear.
The collimator and telescope tubes are one-piece precision casting in light alloy; Rack and pinion focusing devices are provided. The collimator slit with spring-loaded jaws is of a robust design which ensure retention of the initial accuracy.
The graduated prism table support. Scale 180 mm diameter, is divided in degrees; the vernier, reading to 0.1°, is fixed to the telescope arm. This arrangement allows easy estimation to 0.05° from the conveniently positioned vernier scale. The fully adjustable prism table, 75 mm diameter, has screwed holes for the attachment of prism and grating holders to accommodate prisms up to 38mm high.
Large-diameter clamping knobs are fitted for movement control and fine adjustment is provided for the telescope. Complete in card board box.

provided for the telescope. Complete in card board box.

Spectrometer's Accessories

1620. Diffraction Grating Plane Transmission Type 30 x 25 mm, 15000 lines/inch. plate covered with another glass plate.

1621. Diffraction Grating School Quality
25 x 30mm 13400 LPI mounted in plastic frame.

1622. Diffraction Grating Hilger and Watts/Rank Precision 15000 LPI.

1623. Prism Optically Worked for Spectrometer, Equilateral 2 faces polished 25 x 25 mm ht.
a) Borosilicate Crown Glass R. I.1.51
b) Dense Flint Glass R.I. 1.62
c) Extra Dense Flint R.I. 1.65
d) Double Extra Dense Flint Glass R.I. 1.71-1.74

1624. Prism Optically Worked for Spectrometer Equilateral 2 faces Polished 32 x 32 mm ht.
a) Borosilicate Crown Glass R.I.1.51.
b) Dense Flint Glass R.I. 1.62
c) Extra Dense Flint Glass R.I.1.65.
d) Double Extra Dense Flint Glass R.I.1.71-1.74.

1625. Prism Optically Worked for Spectrometer
Equilateral 2 faces Polished 38 x 38 mm ht.
a) Borosilicate Crown Glass R.I. 1.51
b) Dense Flint Glass R.I 1.62
c) Extra Dense Flint Glass R.I 1.65
d) Double Extra Dense Flint Glass R.I. 1.72.

1626. Hollow Glass Prism made from, Solid Glass Block, with sides plane plates for Spectrometer work in Velvet Box
a) 38 x 38 x 25 mm height
b) 38 x 38 x 38 mm height
c) 50 x 50 x 50 mm height

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