Organ Pipe Polished Wood, With Movable Piston Marked With The Chromatic Scale From C (512) To (1024), Overall Length When Fully Extended 880 mm May Be Used For Investing The Phenomenon Of Beats In Conjunction With A Second Pipe Of The Same Type.
Hero'S Engine - Eolipile, Functional Glass Model, Comprising A Borosilicate Glass Bulb 70 mm Diameter Approx, With Side Arms Bent At Right Angles. Complete On Stand But Without Burner, A Functional Glass Model Of The Earliest Form Of Steam Turbine