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

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

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

letting students vary the moment arm distances on either side and find the balance point for any combination of masses

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.