Telescope Model Two Pvc Tubes, Mounted Co-Axially, Consists Of Two Pvc Tubes, Mounted Co-Axially Giving Adjustablelengths By Sliding One Within The Other. Dia. 50 mm And Mag. 5X.
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