US$ 120.00
covering metals
this concave glass mirror at 100mm focal length runs at f/1 for vivid real-image demos and converging-reflection work
sized to read one step up from the 0-1A meter when student circuits draw past the lower meter's full-scale deflection
and cochlear detail for auditory teaching
Single large transparent plate filled with iron-rod plotting compasses
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.
US$ 120.00
US$ 100.00
US$ 400.00
US$ 185.00
US$ 85.00
US$ 80.00
US$ 150.00
US$ 950.00
US$ 2725.00
US$ 40.00
US$ 240.00
US$ 65.00
US$ 120.00
US$ 55.00
US$ 1025.00
US$ 1500.00
US$ 125.00