Double Convex Acrylic Lens, 89mm, 20cm Focal Length, Clear and Frosted Subject_Zoology Standard rheostat at 16 ohms

Standard rheostat at 16 ohms and 4A with oxidized constantan winding on a vitreous-enameled steel tube

5-inch stainless steel connecting rod

Produces steam for thermal-expansion and phase-change experiments through a thick-wall 1L aluminum can on a cast tripod base with a spring handle and size-13 stoppers

Twenty-centimeter steel helical spring paired with 2kg

Double Convex Acrylic Lens, 89mm, 20cm Focal Length, Clear and Frosted Subject_Zoology Standard rheostat at 16 ohmsAcrylic double convex lens at 89mm with one clear face and one frosted, 20cm focal length, the frosted side acting as a screen for projected real image observation.