Conductometer, Five Rod Form
For demonstrating the different heat conductivities of five metals by observing the melting of wax.
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Fitted on a wooden base cast metal uprights and rod mountings. A 20-0-20 scale is provided to notice the expansion in rods. The counter weighted needle is used for easy reading. A knurling screw is provided for zero adjustment. Supplied with three metal rods one of each Aluminium, Brass and Steel.
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Magdeburg Pressure Disks
The set consists of two plastic, 10cm-diameter hemispheres. Each half has a wooden handle firmly attached to it. One of the hemispheres has a raised edge to hold a rubber seal, while the other hemisphere has a stopcock for attaching to vacuum tubing. Join the hemispheres, hook them up to a vacuum pump, and evacuate the air inside the hemispheres. You will find it hard to pull them apart. Open the stopcock to let air in and the hemispheres will separate easily.
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