Resistance Substitution Board, 33Ω - 10MΩ Subcategory_Reflection and Refraction Seventy-times enlarged skin cross section

Seventy-times enlarged skin cross section reveals epidermis

the half-size circulatory model traces arterial and venous pathways from heart to peripheral capillaries

Eight-inch external probe on a 36-inch cord on this handheld digital thermometer

fanning apart visibly when a charged rod approaches to demonstrate electrostatic repulsion and induction

suspending thermometers above hot plates or fixing specimens in orientation

Resistance Substitution Board, 33Ω - 10MΩ Subcategory_Reflection and Refraction Seventy-times enlarged skin cross sectionRotary knob resistance substitution board offering twelve discrete values from 33 ohms to 10M ohms with 4mm lead connections, sized to drop different loads into a circuit without rewiring.