Optically Worked Double Convex Glass Lens, 150mm Focal Length, 38mm Diameter Chemistry_Chemicals this bottle of coarse 20-mesh

this bottle of coarse 20-mesh iron filings is a staple for classroom magnetism and field-pattern demonstrations

Needle valve and flame stabilizer add precision control to this nickel-plated micro Bunsen burner running on natural gas for small-flame work

and storage between uses at the laboratory bench

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

Optically Worked Double Convex Glass Lens, 150mm Focal Length, 38mm Diameter Chemistry_Chemicals this bottle of coarse 20-meshOptically worked glass double convex lens with a 150mm focal length and 1. 5 inch diameter, polished with ground edges for image formation experiments in introductory optics.