Aluminum Plotting Compass, 2" Diameter Base_Octagonal and nucleus for single-celled organism

and nucleus for single-celled organism anatomy teaching

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

and troubleshooting exercises

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

Lamp-house assembly dimensioned as the matched replacement unit for optical bench and light-source apparatus when the original housing reaches end of life

Aluminum Plotting Compass, 2" Diameter Base_Octagonal and nucleus for single-celled organismGlass faced plotting compass in an aluminum case with a dial marked in principal points, used to map field lines around bar magnets and solenoids.