Cross Wires for Optics Experiments Lab Supplies_Filtering Supplies Hand-painted skin cross-section enlarged 300

Hand-painted skin cross-section enlarged 300 times exposes epidermal layers

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

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

Cross Wires for Optics Experiments Lab Supplies_Filtering Supplies Hand-painted skin cross-section enlarged 300Cross 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.