US$ 1012.00
the silvery-blue transition metal used as a hydrocarbon-processing catalyst and in metallurgy student demonstrations
Used to add variable resistance while keeping the slide-wire wiper enclosed
and mid-ocean ridges
Chrome-plated 60mm reading magnifier extending to a 20cm focal length
Optically Worked Double Convex Glass Lens, 75mm Diameter, 1000mm Focal Length Material_Brass the silvery-blue transition metal usedDesigned for parallel beam refraction work, this 75mm double convex glass lens at 1000mm focal length runs at f 13, near collimated for astronomical analogue and long throw projection setups.
US$ 1012.00
US$ 35.00
US$ 192.50
US$ 16.00
US$ 43.99
US$ 12.00
US$ 59.99