Wooden Frame Abacus, 5 Steel Wires Lab Equipment_Centrifuges giving labs and classrooms a

giving labs and classrooms a single-instrument environmental monitor

Greatly enlarged inner ear model exposes bony and membranous labyrinth alongside a sectioned cochlea for vestibular and auditory anatomy teaching

illustrating that sound cannot travel without air

configured to make and break a circuit at the rhythm of a Morse-code transmission for telegraph-history demonstrations

Wooden Frame Abacus, 5 Steel Wires Lab Equipment_Centrifuges giving labs and classrooms aWooden framed abacus with five steel wires and 20 beads per wire on a 13. 5 by 9. 5 inch base, a smaller range counting tool for introductory arithmetic and place value work.