Reading Magnifier, 75mm, 15cm Focal Length Science at Home_Math Wooden-frame abacus with three U-shaped

Wooden-frame abacus with three U-shaped steel wires carrying 20 plastic beads each on a 13 by 6 inch base

5-inch funnel during gravity filtration in chemistry classrooms

Designed to measure Planck's constant through the photoelectric effect

providing the lowest-value reference in the line for low-resistance Ohm's-law and bridge work

Four vinyl-coated prongs grip flasks and burettes up to 4

Reading Magnifier, 75mm, 15cm Focal Length Science at Home_Math Wooden-frame abacus with three U-shapedLarger aperture 75mm lens at a 15cm focal length captures more of a specimen at a glance, the chrome plated metal frame and handle keeping the reading magnifier classroom durable.