Direct Vision Spectroscope in Metal Case Human Anatomy_Human Anatomy Charts & Models Universal laboratory clamp holder with

Universal laboratory clamp holder with dual 360-degree boss head rotation

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

this Wimshurst generator builds a visible high-voltage spark

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

Direct Vision Spectroscope in Metal Case Human Anatomy_Human Anatomy Charts & Models Universal laboratory clamp holder withUsed 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.