Aluminum Plotting Compass, 2" Diameter Prong_3 preserving field strength between magnetism

preserving field strength between magnetism and field-line activities

75-inch analog-to-digital converter samples and quantizes a continuous input into a binary digital output for student visualization

Spring-clipped metal frame on a mounting rod grips gratings

Built on a leveled cast-iron base with a dual-angle polymer top

telophase — progress across this plant mitosis model for cell division teaching in biology courses

Aluminum Plotting Compass, 2" Diameter Prong_3 preserving field strength between magnetismGlass faced plotting compass in an aluminum case with a dial marked in principal points, used to map field lines around bar magnets and solenoids.