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MAGDEBURG HEMISPHERE PLASTIC (0080)
A simple and economical device for demonstrating the effect of atmospheric pressure. The apparatus consists of two plastic hemispheres about 100mm in diameter, both having handles at their top. One of them has a plastic stopcock for pumping out air and releasing vacuum and a rubber D?ring seal inside. The lightweight plastic construction makes them easy to handle and convenient to use. Can be connected to any suitable vacuum pump for evacuation
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KINETIC THEORY MODEL (0081)
For demonstration of the kinetic theory of gases explaining the molecular motion of the gases, thinning of air with increasing altitude, increase in pressure / volume with temperature etc. Comprises clear perspex cylindrical tube mounted on a plastic enclosure with a rubber diaphragm at its lower end and a loose?fitting metal cap at its upper end. Just underneath the diaphragm, a piston connected to a low voltage DC motor through eccentric cam, is provided for producing oscillatory motion or vibration of the diaphragm. A pair of colour-coded 4mm socket terminals provided for electrical connection. Includes metal spheres 1/8" and free-sliding cardboard discs for loading at the top
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'WHITLEY BAY' SMOKE CELL (0082)
Demonstrates the 'Brownian Motion' or random motion of smoke particles. A specially designed plastic box has a sliding lid at the top and contains a glass smoke cell, a cylindrical condensing lens and a low voltage festoon bulb. All components pre adjusted so as to focus the light of festoon bulb to the smoke cell at the correct hei~ht to obtained good contrast in the observation. The plastic box has flanges on either side to facilitate its mounting on the stage of microscope platform using clips. A hole in the lid is aligned with the smoke cell to enable focusing of microscope in the smoke cell. Provided with a pair of 4mm sockets for electrical connections. Also includes a squeeze type plastic bottle for use as smoke generator.
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BROMINE DIFFUSION KIT (0083)
For demonstrating the kinetic theory of gases by means of bromine vapours. Bromine molecules, initially moving at very high velocities with their unrestrained movement within a vacuum, immediately gets stalled when diffusing into air due to their elastic collisions with the air molecules. Designed with safety of the user in mind due to the toxicity of bromine. Comprises two sturdy, thick walled glass diffusion tubes about 430x50mm [height x diameter) with a small side tube near one end, two large bore 8mm stop-cocks with rubber bungs, six glass cap tubes, six bored rubber stoppers, twelve pieces of rubber tubing 125 x 12mm (length x inner diameter), two plastic adapters to adapt tubes to 8mm, one small brush for cleaning tap and one pack of Vaseline. Supplied without bromine.
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MOLECULAR MOTION DEMONSTRATION TUBE (0084)
For demonstration of kinetic theory of matter. Straight tube filled with small glass beads and mercury under highly evacuated condition. When heated on spirit lamp, the mercury boils quickly due to low pressure, agitating violently, imparting bombarding motion to glass beads simulating the Brownian motion with glass beads as gas molecules contained in an enclosed vessel, easily observable to naked eyes
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PULLEYS METAL 38mm (0085)
38mm diameter, machine turned, having wide grooves for whip cord. Mounted in cast metal frame and accurately centered.
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PULLEYS METAL Single with 1 hook 38mm (0085)
38mm diameter, machine turned, having wide grooves for whip cord. Mounted in cast metal frame and accurately centered.
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PULLEYS METAL Single with 2 hook 38mm (0085)
38mm diameter, machine turned, having wide grooves for whip cord. Mounted in cast metal frame and accurately centered.
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PULLEYS METAL Double Sheave (parallel) 38mm (0085)
38mm diameter, machine turned, having wide grooves for whip cord. Mounted in cast metal frame and accurately centered.
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PULLEYS METAL Triple Sheave (parallel) 38mm (0085)
38mm diameter, machine turned, having wide grooves for whip cord. Mounted in cast metal frame and accurately centered.
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PULLEYS METAL Quadruple Sheave (parallel) 38mm (0085)
38mm diameter, machine turned, having wide grooves for whip cord. Mounted in cast metal frame and accurately centered.
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PULLEYS METAL 50mm (0085)
50mm diameter, machine turned, having wide grooves for whip cord. Mounted in cast metal frame and accurately centered.
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PULLEYS METAL Single with 1 hook 50mm (0085)
50mm diameter, machine turned, having wide grooves for whip cord. Mounted in cast metal frame and accurately centered.
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PULLEYS METAL Single with 2 hook 50mm (0085)
50mm diameter, machine turned, having wide grooves for whip cord. Mounted in cast metal frame and accurately centered.
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PULLEYS METAL Double Sheave (parallel) 50mm (0085)
50mm diameter, machine turned, having wide grooves for whip cord. Mounted in cast metal frame and accurately centered.
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