Glass working model with visible valves, fitted on wooden stand, complete with water reservoir.

For verifying laws of composition and resolution of forces, comprising a machined aluminium table 40 cm diam., scale graduated 360°, on heavy vertical support rod and tripod base. Complete with one ri....
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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 swit....
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