7.9" Polypropylene Stirring Rods with Rounded Ends, 7mm, 12-Pack Racks & Stands_Pipette & Burette Stands and glomerulus structures at enlarged

and glomerulus structures at enlarged scale demonstrate filtration anatomy from whole-kidney down to functional unit level

5 by 4-inch ventilation apparatus modeling historic mine-gallery airflow and domestic chimney convection through a candle-driven hot-air-rise demonstration

Built around a monochromatic yellow LED light source and simplified optics

and Ohm's-law study

7.9" Polypropylene Stirring Rods with Rounded Ends, 7mm, 12-Pack Racks & Stands_Pipette & Burette Stands and glomerulus structures at enlargedTwelve pack of 7. 9 inch polypropylene stirring rods with rounded ends, chemical resistant and heat tolerant for general purpose mixing of classroom laboratory solutions.