2.125" Cast Iron Closed Ring with Boss Head Clamp Science at Home_Elementary Science Nine engraved 10 gram brass

Nine engraved 10 gram brass pieces and a 10 gram hanger on this slotted weight set

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

Wooden-frame abacus on a 13

Extreme 300x enlargement resolves fine structures including capillary beds and nerve endings in a detailed skin cross section for histology and dermatology teaching

2.125" Cast Iron Closed Ring with Boss Head Clamp Science at Home_Elementary Science Nine engraved 10 gram brassCast iron closed ring clamp with an integrated boss head, combining a 2. 125 inch outer ring and a thumbscrew rod grip from 5 16 to 5 8 inch for small apparatus support.