Optically Worked Double Convex Glass Lens, 75mm Diameter, 500mm Focal Length Metal Labware_Clamps & Bossheads the candy-bar form letting students

the candy-bar form letting students break each piece into smaller magnets that retain their own north and south poles

Tirrill burner on a stable octagonal base adds air

and a second copper) for side-by-side comparison of conductivity and resistance

1-ohm steps across ten dial positions

catching condensate in distillation and steam-handling setups

Optically Worked Double Convex Glass Lens, 75mm Diameter, 500mm Focal Length Metal Labware_Clamps & Bossheads the candy-bar form letting studentsLong focal double convex glass lens at 75mm diameter and 500mm focal length, the f 6. 7 geometry pushing the focal point downrange for projection style real image formation across long benches.