Hoffman Voltameter with PTFE Stopcocks, Borosilicate Glass Subcategory_Specific Gravity Bottles sized for classroom illuminance and

sized for classroom illuminance and light-intensity investigations

Highest-decade single-dial resistance box stepping from 100k to 1M ohms in 100k-ohm increments

and accessories for quantitative force and friction studies on adjustable inclined surfaces

5 newtons for measuring small forces during spring-law and tension-force classroom investigations

and great vessels on a mounted base for cardiology and anatomy teaching

Hoffman Voltameter with PTFE Stopcocks, Borosilicate Glass Subcategory_Specific Gravity Bottles sized for classroom illuminance andBorosilicate glass Hoffman electrolysis apparatus fitted with chemical resistant PTFE stopcocks, two 50mL graduated outer tubes, a 200mL bulb, plus platinum and carbon electrode sets.