Plastic Magdeburg Hemisphere with Valve, 4.25" Diameter Lab Equipment_Power Supplies this decade resistance box substitutes

this decade resistance box substitutes for fixed resistors in circuit experiments

Enlarged three-times life size with seven separable parts exposing cornea

Needle valve and flame stabilizer add precision control to this nickel-plated micro Bunsen burner running on natural gas for small-flame work

Three-part electricity kit with cell holders

this acrylic light guide traps an injected ray-box beam by total internal reflection

Plastic Magdeburg Hemisphere with Valve, 4.25" Diameter Lab Equipment_Power Supplies this decade resistance box substitutesPlastic 4. 25 inch Magdeburg hemispheres with molded handles, an O ring seal, and a release valve, demonstrating atmospheric pressure through evacuated twin hemisphere separation work.