Soda Glass Pneumatic Trough, 25 x 12.5cm Human Anatomy_Human Skeletons & Bones Eleven ohm 5A air cooled rheostat with Eleven ohm 5A air cooled rheostat with constantan winding on a 300x44mm vitreous enameled steel tube and a slide bar carriage carrying a phosphor bronze contact Glass double concave lens at 50mm diameter and 100mm focal length Soda glass pneumatic trough measures 25 x 12 5cm for gas collection over water and chemistry demonstration applications
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Soda Glass Pneumatic Trough, 25 x 12.5cm Human Anatomy_Human Skeletons & Bones Eleven-ohm 5A air-cooled rheostat with