Single Pulley with 1 Hook, Aluminum Frame, 3.5 x 2" LabLearner verifying the Boolean disjunction operation

verifying the Boolean disjunction operation by direct observation

and nucleus for single-celled organism anatomy teaching

Higher-range 30-0-30mA center-zero galvanometer at 20mA sensitivity and plus-or-minus 2

High-tension power supply driving spectrum and discharge tubes in atomic spectra and gas discharge demonstrations for advanced physics classrooms

Single Pulley with 1 Hook, Aluminum Frame, 3.5 x 2" LabLearner verifying the Boolean disjunction operationAluminum bodied single pulley in a 3. 5 by 2 inch metal frame with a centered 2 inch wheel and one hook, sized to suspend from a stand for mechanical advantage experiments.