Ceramic Ring Magnet, 1.375" OD x 0.75" ID, 5-Pack Lab Equipment_Power Supplies Large frog dissection model with

Large frog dissection model with numbered structures reveals digestive

measuring period under different loads to isolate mass from weight

Nine removable sections expose cortical hemispheres

Pocket-sized 45mm aluminum compass with a graduated dial

Reproduces Ewald von Kleist's 1745 charge-storage device with concentric metal cups around a plastic dielectric

Ceramic Ring Magnet, 1.375" OD x 0.75" ID, 5-Pack Lab Equipment_Power Supplies Large frog dissection model withFive ceramic ring magnets at 1. 375 inch outer, 0. 75 inch inner, and 0. 3125 inch thickness, sized to stack on a vertical rod for like pole repulsion levitation demonstrations.