Plain Still Head with B14 Thermometer Socket, 24/29 Flask and 24/29 Condenser Cones, Borosilicate Glass Diameter_7mm the longest working face in

the longest working face in the line stretching beam travel for class-front lateral-displacement demos

this electromagnet-driven pivoted-arm sounder on a wooden base produces the snap of early telegraph operation when current pulses the coil

six steel wires carrying 20 beads each for hands-on instruction in counting

this demonstrator exposes coil

Plain Still Head with B14 Thermometer Socket, 24/29 Flask and 24/29 Condenser Cones, Borosilicate Glass Diameter_7mm the longest working face inPlain still head in borosilicate 3. 3 glass features B14 thermometer socket and 24 29 connections for distillation temperature monitoring.