Aluminum Plotting Compass, 2" Diameter Base_Octagonal Greatly magnified transverse dicot stem

Greatly magnified transverse dicot stem model on a mounted base exposes vascular bundle arrangement and primary tissue layers for advanced botany teaching

and nucleus for single-celled organism anatomy teaching

Pink dots mark opposing poles on this 37 x 9mm Alnico cylinder pair

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

Aluminum Plotting Compass, 2" Diameter Base_Octagonal Greatly magnified transverse dicot stemGlass faced plotting compass in an aluminum case with a dial marked in principal points, used to map field lines around bar magnets and solenoids.