US$ 44.95
uniform heat conduction through the walls
Used to draw electrons from glass and ebonite rods during rubbing
Handmade wooden spice rack holds twelve 6-inch borosilicate glass test tubes with caps and includes a filling funnel for kitchen-to-lab cross-over gifting
holding twelve tubes up to 22 mm diameter for classroom and professional bench setups
Plano-Cylindrical Lens, +10 Diopter State_Solid uniform heat conduction through thePairs a 50 by 50mm plano cylindrical glass lens with +10 diopter optical power, focusing light along a single axis for astigmatism correction, line focus, and cylindrical optics demos.