Symon's Rain Gauge Graduations_50mL this coil draws tens of

this coil draws tens of thousands of volts from a 9-12V DC source to strike 50mm sparks

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

87-inch focal length

Needle valve and flame stabilizer add precision control to this nickel-plated micro Bunsen burner running on natural gas for small-flame work

5% ±1 digit accuracy across a 200mV to 1000V DC range distinguishes this handheld meter

Symon's Rain Gauge Graduations_50mL this coil draws tens ofSymon's rain gauge with an iron sheet outer cylinder, brass collar, and overflow catching inner vessel, providing a standard method for cumulative rainfall measurement.