Small Student Anemometer Meters_Electrical 25 inch ceramic bar pair

25 inch ceramic bar pair simplify pole identification

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

Five-inch demonstration compass with a 4-inch magnetic needle and a printed compass map

Youth-proportioned half-size torso with 9 removable parts including brain

237kg hooked masses for measuring spring extension under load and calculating spring constants

Small Student Anemometer Meters_Electrical 25 inch ceramic bar pairCorrosion resistant and sized for hand held use, this small anemometer measures wind speed during earth science fieldwork and classroom weather investigations.