Wooden Friction Block Set with Plain, Felt, and Sandpaper Surfaces Capacity_150mL Used to compare EMFs and

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

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

Laboratory-grade potassium alum used for water purification demonstrations

Greatly magnified transverse monocot stem section on a mounted base exposes scattered vascular bundle layout for advanced plant anatomy coursework

Center-zero 3

Wooden Friction Block Set with Plain, Felt, and Sandpaper Surfaces Capacity_150mL Used to compare EMFs andThree 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.