Comprising a strong U-shaped magnet and a pair of brass rails with 4mm socket terminals. A brass axle with plastic discs is free to roll along the rails and completes the electrical contact between them. When the axle is placed on the rails between the poles of the magnet and a power supply unit is connected, the axle is repelled and rolls along the rails away from the center of magnetic field. Dimensions 175x60x58mm high.

Gravesande's, ring mounted in rod with handle, ball with chain. Cold ball passes through the ring but does not pass when heated the ring & the ball with separate handles

To illustrate expansion of metal on heating and contraction on cooling, with steel bar of length 100 x 10 mm and plated brass gauge with a cut-out to just accommodate the bar and two holes through which the bar passes when cold.

ALINCO, in pairs, Lifting Power 500 gms., with keepers. Dimensions are nominal. Supplied in card board boxes.

	Size
A	37 x 13 x 10 mm
B	50 x 13 x 10 mm
C	75 x 13 x 10 mm
D	100 x 13 x 10 mm
E	150 x 13 x 10 mm

Chrome Steel, 12 mm. diameter, in Pairs. Length: 50mm, 100mm, 150mm

ALINCO, Round edges, in Pairs, with keepers, Dimensions are nominal. Supplied in cardboard boxes.

Pipette type, comprising glass float calibrated having coloured zones for charged, partly charged and uncharged conditions. Compressible bulb and rubber tube with fittings to glass body.

For use on pump plate not less than 15 cm. dia Electric Bell operating on 4-6 volts AC/DC, suspended on rubber cord in bell jar. Fine coiled wire connections to terminals mounted in rubber bung sealing the jar.

A spherical conductor on insulating stand with two hollow hemi-spheres, each with insulated handle,to show that electrostatic charge resides on outer surface.

Two glass tubes 220 mm long, one with closed top & the other open and connected by 1 metre pressure rubber tubing, are mounted on two brackets sliding on two vertical metal rods fixed rigidly on a stand. The stand has a graduated scale 0 to 100 cm. Supplied without mercury.

Consists of two units, each mounted on a plastic base which can be clamped to a 12 mm diam. retort stand rod. The solenoid unit ensures prompt release of a metal sphere on de-energising. The gate switch unit comprises a hinged steel plate held against an adjustable contact by a small magnet so that by proper adjustment, the plate falls promptly as soon as the falling sphere falls on it. Complete with stand.

75 x 50 mm diameter resting on felt pad inside an outer vessel, 100 x 75 mm diameter. Outer vessel fitted with detachable clip-type thermometer support. Complete with stirrer.

Nickel plated copper calorimeter of 63 x 63 mm lagged and enclosed in an outer vessel of 80 x 90 mm size, with cover having terminals, a heating coil suitable for 3-6 V supply and holes for thermometer

Copper calorimeter 75 x 50 mm with felt insulation, outer vessel of 100 x 65 mm size with a plastic lid having holes for thermometer & stirrer. A thermometer holder is fixed to the outer vessel. Complete with stirrer.

Metal frame with six glass tubes of different bores,each of 150 mm length, fitted with corks, to show different heights of water column in different bore tubes.

Stainless steel rod 1200 mm long, l0 mm diam. with one pair each of small & large, light & heavy masses, two steel knife edges in adjustable holders & a metal bracket support drilled for wall mounting.

Plated brass,each conductor on insulated stand

Specification

Comprising a heavy-gauge copper outer vessel with an internal perforated shelf for copper sulphate crystals, a porous pot and an amalgamated zinc rod fitted with a wooden supporting cap. The zinc rod and copper vessel are each provided with a 4 mm. socketed terminal.

• In this cell E = 1.08 V approx.
• Working capacity 0.85 litre
• Size of copper vessel : 130 x 90 mm diameter approx.
• Size of porous pot : 150 x 150 mm diameter approx.
• Size of zinc rod : 150 x 12 mm diameter approx.

Designed with pot core stability for standard laboratory use. Useful as an oscillator element, wave shaping and resonance experiments, bridge experiments. Fuse protection for safety, + 3% accuracy.

A: Comprising a stout metal box, 100mm diameter, with aluminium dial graduated in degrees 0-90 four times, anti-parallex mirror slot made by bakelite.
B: As above, but made of bakelite/metal case, mounted on wooden base with meter scale.

The motor is mounted on a base with a driving wheel.Output is through 4 mm sockets and a low voltage bulb is also provided as a simple output indicator.