Soda Glass Pneumatic Trough with Concave Base, 7.8 x 4 inch Glassware_Glass Bottles the doubled-apex prism producing about

the doubled-apex prism producing about twice the deviation of the 5° unit while still in the small-angle regime

Finger-grip handle keeps fingers clear of heat on this plated spring steel wire test tube clamp when holding tubes above a burner flame during classroom demonstrations

viewable between clear plates so students watch sprocket teeth grip and transfer torque under load

used in step-up and step-down ratio demonstrations of Faraday's law

and resonance through a 6V motor driving cams and spring actuators across four springs and two hanging masses on a 19-inch frame

Soda Glass Pneumatic Trough with Concave Base, 7.8 x 4 inch Glassware_Glass Bottles the doubled-apex prism producing aboutSoda glass pneumatic trough with concave base measures 7. 8 inches diameter by 4 inches tall for gas collection over water.