Optically Worked Double Convex Glass Lens, 75mm Diameter, 150mm Focal Length Physics_Force & Motion Fifty-turn 4A coil for the

Fifty-turn 4A coil for the demountable transformer

copper-sulfate refining

this pack of premium qualitative filter paper offers medium-speed gravity filtration with a 10-micron pore size at 85 gsm weight

the spare-letter variant in the family with mechanical specs matching the rest of the line

demonstrating atmospheric pressure through evacuated twin-hemisphere separation work

Optically Worked Double Convex Glass Lens, 75mm Diameter, 150mm Focal Length Physics_Force & Motion Fifty-turn 4A coil for theDouble convex glass lens at 75mm diameter and 150mm focal length, the f 2 geometry balancing convergence and throw for projection style real image formation in refraction setups.