Optically Worked Double Convex Glass Lens, 75mm Diameter, 300mm Focal Length, Alternate Model Color coded periodic table Periodic table Chemical elements Periodic table poster reading static pH in water

reading static pH in water

soot-deposition

Ten-pack of 14-inch insulated crocodile leads with a clip on each end

Full collapsible-can kit with a metal can

Paper chromatography kit separates mixtures using capillary action and solvent polarity for up to 15 student groups with comprehensive procedure guides and materials

Optically Worked Double Convex Glass Lens, 75mm Diameter, 300mm Focal Length, Alternate Model Color coded periodic table Periodic table Chemical elements Periodic table poster reading static pH in waterAlternate model 75mm double convex glass lens at 300mm focal length, the optically worked surfaces and ground polished edges parallel to the main line 300mm focal lens for backup stock use.