Double Convex Acrylic Lens, 89mm, 20cm Focal Length, Clear and Frosted Subject_Zoology 237kg hooked masses for measuring

237kg hooked masses for measuring spring extension under load and calculating spring constants

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

Compact regulated +15V DC power pack rated at 1 A

5% accuracy on a 60mm scale

Measures specific gravity with a complete kit: 1N/100g dynamometer

Double Convex Acrylic Lens, 89mm, 20cm Focal Length, Clear and Frosted Subject_Zoology 237kg hooked masses for measuringAcrylic 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.