Closed Retort Ring with Stem, 5.9" ID, Plated Mild Steel Material_Bristle designed to receive real images

designed to receive real images projected by lenses and concave mirrors during focal-length and magnification experiments on the optical bench

and a six-turn thick coil for hands-on Lenz's law and induction-heating work

closing to a stored length of 6

Tabletop analog DC ammeter measuring 0-1A at 0

Long-format 150mm-length equilateral acrylic prism with 25mm faces

Closed Retort Ring with Stem, 5.9" ID, Plated Mild Steel Material_Bristle designed to receive real imagesPlated mild steel closed retort ring with a 5. 9 inch inner diameter and 5. 5 inch stem, sized for large flasks and funnels held over heat sources in chemistry setups.