Simple Respirometer for Biology Experiments Subcategory_Thistle Funnels sized to demonstrate cathodic deposition

sized to demonstrate cathodic deposition and the coulometric form of Faraday's first law

General purpose googles with side ventilators

Louis open frame

providing a direct numeric current reading for student circuits where analog needle deflection would be too coarse to resolve cleanly

sized so the heavier D cell stays seated when student-built circuits are picked up

Simple Respirometer for Biology Experiments Subcategory_Thistle Funnels sized to demonstrate cathodic depositionSimple respirometer measures oxygen consumption in germinating seeds, small animals, or yeast cultures for metabolic rate experiments in biology labs.