Demonstration Electroscope with Conductor Sphere and Needle Indicator Subcategory_Beakers Engineered with a higher spring

Engineered with a higher spring constant than a classic coiled novelty spring

Heavy-duty 500-piece teacher molecular model set with 230 atoms and 270 bonds

with a 0 to 20 second reaction window for sanitation and food-safety checks

Three-part electricity kit with cell holders

exposing the full urinary tract for combined anatomy and physiology teaching at 15 by 9 inches

Demonstration Electroscope with Conductor Sphere and Needle Indicator Subcategory_Beakers Engineered with a higher springTopped with a large conductor sphere and a deflecting needle indicator, this demonstration electroscope detects and visually quantifies the magnitude of static charges.