Symon's Rain Gauge Graduations_50mL Diffraction grating mounted on a

Diffraction grating mounted on a 90 x 40mm card slide

providing dense uniform spheres for ramp-and-collision experiments where a heavier projectile is needed than the plastic marbles can provide

designed to slot inline with other PH1029-series modules to build a complete student-wired circuit on the lab bench

commutator

and three low-friction nylon wheels for straight-line momentum experiments

Symon's Rain Gauge Graduations_50mL Diffraction grating mounted on aSymon's rain gauge with an iron sheet outer cylinder, brass collar, and overflow catching inner vessel, providing a standard method for cumulative rainfall measurement.