Working Steam Engine Model with Piston and Slide Valve Botany_Botany Charts & Models each foam-protected in a wooden

each foam-protected in a wooden case with frequencies labeled

Dial-gauge expansion apparatus with three interchangeable metal rods for heating and measuring the small length change each metal undergoes

this Hall's car supports dynamics work on inclined planes with weights and pulleys

used to map the circular field around a current-carrying wire and confirm the right-hand rule

Working Steam Engine Model with Piston and Slide Valve Botany_Botany Charts & Models each foam-protected in a woodenCutaway working steam engine model with piston, slide valve, and link motion reversing mechanism, the flywheel light enough to drive by breath for hands on reciprocating engine study.