Wooden Friction Block Set with Plain, Felt, and Sandpaper Surfaces Capacity_150mL Qualitative coliform detection kit supplying

Qualitative coliform detection kit supplying lactose-broth tubes for water-quality testing

Used to compare EMFs and measure internal resistance by the null-deflection method

Laboratory-grade potassium alum used for water purification demonstrations

transmitting light end-to-end via total internal reflection to give a tabletop analogue of a fiber-optic cable

Smaller 30mL dropper format of 1% aqueous Congo red solution

Wooden Friction Block Set with Plain, Felt, and Sandpaper Surfaces Capacity_150mL Qualitative coliform detection kit supplyingThree block friction set with pine, sandpaper, and felt surfaces in 6 by 3 by 1. 25 inch blocks, each with C hooks at both ends for spring scale pulls on ramps or flat surfaces.