Description

4 inches with thread-fitted joints tuning pressure by screw

this aluminum cone on an insulating rod holds induced charge for surface-charge mapping with a proof plane

letting students route current down either branch of a circuit by choosing which slot the plug occupies

and vascular cylinder for plant anatomy and absorption teaching

Cross Wires for Optics Experiments Lab Supplies_Filtering Supplies 4 inches with thread-fitted jointsCross wires set inside a 10mm aperture on a 75mm circular black metal screen, providing a fixed sighting reference for telescope and spectrometer alignment on the optical bench.

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Cross Wires for Optics Experiments Lab Supplies_Filtering Supplies 4 inches with thread-fitted joints

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