Physics Instruments

For determining the relative conductivity of thin layers of materials, it consists of cylindrical brass slab of llcm dia and 1O.5mm thickness. On this is connected another 4.5cm deep ~rass hollow cylinder (steam chest) of the same dia with inlet and outlet tubes for steam. A hole for thermometer js drilled radially in each, and the cylindrical brass slab is fitted with eyelets to enable it to be suspended by three strings from a stout annular ring. The ring is held on a heavy PSAW Retort Stand complete as above with accessories but without thermometer.

This complete apparatus consists of a nickel plated steam jacket (brass pipe of 50cm long and 2.5cm in diameter) containing one out of three test rods, a heavy support assembly to mount the steam jacket vertically, fitted with superior quality spherometer. The brass pipe (steam jacket) has a welded inlet and outlet tube for steam and opening for a thermometer. Complete with three test rods but without thermometer.

In addition to providing precision data leading to accurate determination of the coefficient of expansion, this apparatus illustrates and gives the students experience in practical applications of the spherometer, as a measuring tool. The apparatus consists of a steam jacket (brass pipe) 50cm long and ~.5cm dia with inlet and outlet tubes for steam and opening for a thermometer, fitted with spherometer. The spherometer reads up to O.Olmm. The exact setting at which it contacts the rod may be indicated by using an electric contacting circuit, such as a dry cell or buzzer. Supplied complete with 3 test rods.

The simple, rugged construction of this inexpensive apparatus has made it very widely used for elementary work. The apparatus consists of a heavy metallic base of size 50x 10 cm with four vertical pillars. One supports a pointer, pivoted at its upper end, with the free lower end traversing on arbitrary scales. In the same pillar there is a supporting bracket for the specimen rod. The second pillar carries the arbitrary scales. The third pillar holds the brass rod from the center. The fourth pillar supports the second end of the specimen rod (brass rod) and has an adjustment screw for setting the pointer to zero. Dimension

An experimental unit designed for work in degree science laboratories. The PSAW Lummer Brodhum Photometer assembly is assembled from the following standardized components. a) L.B Photometer Head : A finely made instrument with the best imported optics and now with the latest system rigid fixing of all optical components. Light from two sources falls on either side of a uniform white opaque screen. Thus it is reflected by side reflectors ( Optical Prisms ) and passes through the Lumner Brodhun cube. Observing the field through a telescope, the two light intensities are compared directly. The compact Photometer head is mounted in a swivel bracket to facilites reversal of the slides. b) Lamp House 2 nos. On electric bulb is encased in a metal case with cord & pin, finished optical black.

Spare wooden boxes, for Bar Magnets.
A 50mm
B 75mm
C 100mm
D 150mm

ALINCO, in pairs, lifting power 500gm with keepers. Dimensions are nominal. Supplied in cardboard boxes.

Cat No.	Size
1117/B 1	37 x 13 x 10mm
1117 /B 2	50 x 13 x 10mm
1117/B 3	75 x 13 x 10mm
1117/D 4	100 x 13 x 10mm
1117/E 5	150 x 13 x 10mm

ALINCO, in pairs with keepers. Dimensions are nominal. Supplied in cardboard boxes.

Cat No.	Size
1117/A 1	25 x 15 x 10mm
1117/B 2	37 x 15 x 10mm
1117/ B 3	50 x 15 x 10mm
1117/B 4	50 x 15 x 10mm
1117/B5	75 x 15x 10mm
1117/D6	100 x 15 x 10mm
1117/E 7	150 x 15 x 10mm

Chrome steel in pairs, red painted with keepers. Dimensions are nominal.

Cat No.	Size
1117/ 1	25 x 12 x 10mm
1117/ 2	37 x 12 x 10mm
1117/ 3	50 x 12 x 10mm
1117/ 4	50 x 12 x 10mm
1117/5	75 x 12x 10mm

NYLON ROD
Length approx 30cm and 12mm dia.
POLYTHENE ROD
For use as insulators, length approx 30cm and 13mm dia.
FRICTION ROD, EBONITE
Length approx, 30cm and 12mm dia.
FRICTION ROD,GLASS
Length approx, 30cm and 13mm dia.
FRICTION ROD. PERSPEX
Highly finished length 30cm and 12.5mm dia approx.
FRICTION ROD, COMPOUND
Half glass half brass 30cm length and 13mm dia approx.
FRICTION ROD, COMPOUND
Half ebonite half brass 30cm length and 13mm dia approx.
WOOL CLOTH PIECES
Square size 30x30cm approx.
RUBBER SILK
Square size 30x30cm approx.
SILK CLOTH PIECE
Square size 30x30cm approx.

A large scale transformer, ideal for classroom. The coils are fitted with intermediary outputs providing many transformation ratios. Moreover, one of them has a mains cable so that you do not require an external power supply unit.
Consisting of:
A 1 magnetic circuit made up of highly permeable U-shaped metal sheeting, which can be closed via two clamps with tightening screws.
B Section 40x40mm length 150mm height 170mm
C One coil of 6000 turns, 350 ohms, 1 max 0.2A intermediary 2000 turns output used.
D One coil of 6000 turns, 1max: 2.5A. Mainly to create the transformer primary. Provided with power supply cable.
E One coil 1200 turns, 12.5 ohms, 1max: 1.25A fitted with intermediary 400 and 800 turns outputs
F One coil of 72 turns 1 max: 12A, has intermediary 6,30,54 and 66 turns output.

Lifting type.Built with a coil of 300 turns of insulated copper wire. Operates on 6-12 volts and will easily lift 15kg when energized by a current of 6-8A. Complete with disc armature.

Non-magnetic pillar with carbon steel point, on stable base, overall height 110m

Carbon steel with jewel bearing for pivoting.
Length A 50mm
B 75mm
C 100mm

Specially made high magnetized with accurate brass center with low friction

	Size
1)	50 mm
2)	75 mm
3)	100 mm