Set of 25 Rocks & Minerals, Cardboard Box Racks & Stands_Pipette & Burette Stands 5V flash-lamp bulbs in student-built

5V flash-lamp bulbs in student-built circuits and small-scale optics demonstrations

sized for the positive-rail side of color-coded bench wiring

Brass-spheres electrostatic discharge tongs at 20 cm with adjustable jointed rods and an insulated ebonite handle

Mid-range single-decade resistance box stepping from 100 ohms to 1000 ohms in 100-ohm increments

Set of 25 Rocks & Minerals, Cardboard Box Racks & Stands_Pipette & Burette Stands 5V flash-lamp bulbs in student-builtSet of 25 Collection of different minerals and rocks collected from different places. Set of 25 Collection of different minerals and rocks collected from different places, supplied in cardboard box. Each specimen labelled with name.