Open-Type Economy Rheostat, Model B5 Included_Rod & Base sized to give student bench

sized to give student bench setups a direct numeric reading without analog parallax

and magnetic force interactions

channeling displaced water cleanly into a collecting beaker for Archimedes-principle work

Eight aluminum-shank tuning forks tuned to scientific pitch (C4 = 256Hz) and ranging from 5 9/16 to 7 1/8 inches

offering a well-characterized expansion coefficient for comparative-metals work

Open-Type Economy Rheostat, Model B5 Included_Rod & Base sized to give student benchUsed as a series resistor or potentiometer in adjustable current circuit work, this open type slide wire rheostat carries oxidized constantan winding on a pipe with three 4mm sockets.