Convection Tube with Filling Funnel, 6 x 10" Subcategory_Alternative Energy this double-convex converging lens gathers

this double-convex converging lens gathers parallel light to a single focal point for bright image-formation demonstrations

and steel cubes machined to the same 1

and classroom decor activities

supplied in a storage case for student precision work

Integrated tongue and dentition at 2x life size supports combined teaching of oral cavity anatomy

Convection Tube with Filling Funnel, 6 x 10" Subcategory_Alternative Energy this double-convex converging lens gathersHeavy wall borosilicate 3. 3 glass convection tube at 6 by 10 inches with a filling funnel, showing liquid convection currents as heat applied at one corner circulates colored dye.