Restless Earth Geology Teaching Model Light & Optics_Color Five-hundred-milliamp DC scale on a

Five-hundred-milliamp DC scale on a 315x115mm laminated panel with sealed shunt

5m of twin flex for connection to mains-grade optical-bench setups

Wall-mounted Mason's hygrometer with two identical dual-scale thermometers — one dry and one kept wet via a water reservoir — calculating relative humidity from their paired reading difference

this pipette-type hydrometer draws electrolyte into a glass body with a colored-zone float for direct reading

and reproductive systems for amphibian anatomy teaching

Restless Earth Geology Teaching Model Light & Optics_Color Five-hundred-milliamp DC scale on aWall mountable Earth dynamics model depicting sea floor spreading, subduction zones, continental interiors, and mid ocean ridges, each structure individually labeled for plate tectonics units.