Rectangular Refraction Acrylic Block, 100 x 75 x 18mm Subcategory_Microscope Slides each 20mm on edge with

each 20mm on edge with a top hook for suspending in water during Archimedes-principle and buoyancy experiments

and biliary anatomy for digestive and pathology teaching

measuring period under different loads to isolate mass from weight

this fan-shaped nylon brush rides a twisted stainless steel handle flexible enough to bend around difficult interior angles

this metal-cased spectroscope pairs a 600 lines/mm holographic replica grating with sample vials and mount

Rectangular Refraction Acrylic Block, 100 x 75 x 18mm Subcategory_Microscope Slides each 20mm on edge withPairs 100 by 75mm with 18mm thickness on an acrylic rectangular refraction block, the wider working face giving longer beam paths for clear refraction angle measurements.