3D Plant Cell Division (Meiosis) Model, 24 x 18", Hand-Painted Size_Small Eleven-ohm 5A air-cooled rheostat with

Eleven-ohm 5A air-cooled rheostat with constantan winding on a 300x44mm vitreous-enameled steel tube and a slide-bar carriage carrying a phosphor-bronze contact

Ranvier-pattern hand microtome uses a screw-thread mechanism for precise specimen advancement during thin-section cutting and microscope slide preparation

Battery-free analog mechanical stopwatch reading to one-tenth of a second

this insulated 4mm-stackable safety lead carries up to 12A through nickel-plated split-hollow pins for branched-circuit student work

Rolled-rim parallel-sided copper calorimeter at 4 inches tall by 2

3D Plant Cell Division (Meiosis) Model, 24 x 18", Hand-Painted Size_Small Eleven-ohm 5A air-cooled rheostat withThree dimensional plant meiosis model traces chromosome pairing, crossing over, and reduction division through successive hand painted stages on a mounted base.