2.125" Cast Iron Closed Ring with Boss Head Clamp Science at Home_Elementary Science providing the lowest-value reference in

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

Wooden-frame abacus on a 13

this wool cloth is a standard accessory for electroscope and Van de Graaff work

Highly-detailed digestive canal model isolates the GI tract from surrounding organs to expose mucosal and muscular layers along the full length of the canal

2.125" Cast Iron Closed Ring with Boss Head Clamp Science at Home_Elementary Science providing the lowest-value reference inCast 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.