6-Piece Acrylic Lens Set, 38mm (Convex, Concave, Plano, Meniscus) Gifts_Kitchen Discontinued bench instrument with continuously

Discontinued bench instrument with continuously variable 0-30V DC at 2A plus stepped 1-6V AC in 1V increments

this decade box selects cascaded values for RC-time-constant

Half-wood-half-metal 200 by 30mm cylinder demonstrating thermal-conductivity differences through a wrapped paper that scorches over wood but stays uncharred over metal in flame

Used to spin the Newton disc into a perceived white via persistence of vision

Demonstrates electromagnetic switching on a base with 4mm plug connections

6-Piece Acrylic Lens Set, 38mm (Convex, Concave, Plano, Meniscus) Gifts_Kitchen Discontinued bench instrument with continuouslyCompact 38mm acrylic six piece lens set covering convex, concave, plano convex, converging and diverging meniscus, and plano concave geometries for safer student station optics.