US$ 187.50
Used to produce concentric Newton's rings under monochromatic light
and bladder in anatomical position
Wooden-frame abacus with three U-shaped steel wires carrying 20 plastic beads each on a 13 by 6 inch base
and 2 quadruple pulleys on a heavy composite base with capstan
Reading Magnifier, 50mm, 12cm Focal Length Capacity_125mL Used to produce concentric Newton'sChrome plated metal framed 50mm reading magnifier with a 12cm focal length, sized for fine print reading and convex lens image formation work in introductory optics.
US$ 187.50
US$ 70.99
US$ 251.00
US$ 449.50
US$ 50.00
US$ 29.99
US$ 93.99
US$ 206.25