3D Plant Cell Division (Meiosis) Model, 24 x 18", Hand-Painted Size_Small Battery-free analog mechanical stopwatch reading

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

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

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

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

sized to fit standard optical-bench lamp houses and stocked together so a burned-out lamp does not stall an experiment

3D Plant Cell Division (Meiosis) Model, 24 x 18", Hand-Painted Size_Small Battery-free analog mechanical stopwatch readingThree dimensional plant meiosis model traces chromosome pairing, crossing over, and reduction division through successive hand painted stages on a mounted base.