Balancing Lever Kit, Class Pack of 5 Lab Equipment and Supplies_Sensors and image-formation experiments in introductory

and image-formation experiments in introductory optics

and internal organ systems for freshwater fish anatomy teaching

Seven hand-painted removable parts expose atria

NPN transistor in a protective enclosure with labeled base

Two-cylinder brass fluid-pressure apparatus with 19mm and 38mm leather-packed pistons connected by a brass tube

Balancing Lever Kit, Class Pack of 5 Lab Equipment and Supplies_Sensors and image-formation experiments in introductoryFive lever balancing class pack with 600mm plywood levers, 4 fulcrum triangles, and 40 metal masses matched to 1%, deliberately using non standard graduations to build empirical reasoning.