Ganong's Potometer with PTFE Key and Wooden Base Item Type_Scissors Acrylic double-convex lens at 89mm

Acrylic double-convex lens at 89mm with one clear face and one frosted

5 inches) make north and south poles instantly identifiable during attraction

each topped with a small handling knob and stored in a hardwood block for classroom balance coursework

the wide aperture suiting full-class divergence demos and security-mirror analogue investigations

this thermistor mounts on a transparent base with 4mm color-coded sockets and a printed circuit diagram for sensor-circuit student work

Ganong's Potometer with PTFE Key and Wooden Base Item Type_Scissors Acrylic double-convex lens at 89mmPTFE key stopcock resists chemical attack on this Ganong potometer, supporting plant transpiration measurement on a wooden base across repeated lab sessions.