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

Sturdy wooden pulley simple-machine model with multiple pulleys mounted in series and parallel

four-chamber stomach

Used with standard laboratory filter funnels

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.