Open-Ended Borosilicate Glass Combustion Tube, 11.8 inch, 0.86 inch Diameter Stock Type_Build to Order used to demonstrate standing waves

used to demonstrate standing waves in air through powder-pile node spacing measurements

Air-cooled rheostat with extended-tube ventilation

Two-part karst landform model with a removable surface that exposes caves

Wooden-base Newton's color disc at 13 inches tall

Open-top cylindrical dropping funnel in borosilicate glass holds 50mL with PTFE key stopcock for controlled liquid addition in chemistry procedures

Open-Ended Borosilicate Glass Combustion Tube, 11.8 inch, 0.86 inch Diameter Stock Type_Build to Order used to demonstrate standing wavesOpen ended combustion tube in borosilicate glass measures 11. 8 inches long with 0. 86 inch diameter for high temperature chemistry analysis.