Direct Vision Spectroscope in Metal Case Human Anatomy_Human Anatomy Charts & Models Beech wood test tube rack

Beech wood test tube rack holds 12 tubes up to 20mm diameter in a 9-inch frame for organized storage during chemistry and biology experiments

Push-button engagement on a hand-cranked single-sided cone clutch

this Van de Graaff generator delivers spark-producing high-voltage demonstrations in the physics classroom

calibrated to 2

delivering wheel-driven power to a lamp or a Newton color disc

Direct Vision Spectroscope in Metal Case Human Anatomy_Human Anatomy Charts & Models Beech wood test tube rackUsed to read spectral lines against a 400 700nm graduated scale, this metal cased spectroscope pairs a 600 lines mm holographic replica grating with sample vials and mount.