Universal Battery Charger Heat & Thermodynamics_Temperature & Heat and a 1-degree protractor

and a 1-degree protractor

providing a stable burner on classroom benches while controlling flame type through a collar

and heart-tube formation for embryology and developmental biology teaching

letting students route current down either branch of a circuit by choosing which slot the plug occupies

Zinc alloy natural gas Bunsen burner with flame stabilizer ships with a 2-foot neoprene gas hose for quick bench hookup in chemistry classrooms

Universal Battery Charger Heat & Thermodynamics_Temperature & Heat and a 1-degree protractorDesigned to recharge the cells used in laboratory apparatus, this universal charger keeps portable instruments running between sessions without rotating in fresh disposable batteries.