Description
covering metals
this concave glass mirror at 100mm focal length runs at f/1 for vivid real-image demos and converging-reflection work
and field magnet for direct observation as students trace how current produces rotation in a closed magnetic circuit
Used to draw electrons from glass and ebonite rods during rubbing
sized for beginner circuit and physics labs
Opisometer Geology covering metalsOpisometer with a knurled wheel on a threaded spindle, rolling along curved lines on maps, charts, and drawings to convert winding distance into straight line length for geography coursework.
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