Double Long Pulley, 2" and 1.5" Wheels Handle Type_Wood Research-grade oxygen spectrum tube at

Research-grade oxygen spectrum tube at 26cm with a 10cm central capillary

Double-walled in aluminum to minimize heat exchange with the surrounding air

and leaf-electroscope demonstrations

configured to contrast eddy-current damping in continuous versus interrupted conductors

Compact metal-box convection demonstrator at 10 by 4 by 3 inches with two glass chimneys

Double Long Pulley, 2" and 1.5" Wheels Handle Type_Wood Research-grade oxygen spectrum tube atUnequal wheel pulley with a 2 inch and a 1. 5 inch wheel at 5. 75 inches overall in a metal frame with end hooks, showing how different wheel diameters change mechanical advantage.