Guinea And Feather Apparatus, Glass Tube Is 50Cm (20in) Long And 16mm Diameter With Two Rubber Bungs, One Carrying Brass, And 40Cm Long Pressure Rubber Tubing To Connect To Vacuum Pump, Includes: (1) Glass Tube, (1) Piece Of Rubber Tubing
Gyroscope, 7.5cm brass wheel balanced with three pairs of adjustable pivots fitted on stand, 3 cm at its rim, carefully balanced and all three pairs of pivots are adjustable, Complete fitted on stand
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