Differential Model, permits the instructor and student to manually turn the handle and apply a load to the transparent wheels to demonstrate the differential mechanism, permits power from the engine to be transmitted to a pair of driving wheels.
Diffraction Apparatus, Used to map light intensity versus position for many-slit geometries, Slits are made by depositing metal film on glass, creating extraordinarily clean slits with fully opaque blocking areas.
Diffusion and Osmosis kit, Blood group identification, 4 Simulated Blood Samples, Simulated anti-A serum, Simulated anti-B serum, Blood typing trays, Toothpicks, to determine the blood type of four unknown samples