Optically Worked Double Concave Glass Lens, 75mm Diameter, 500mm Focal Length Subcategory_Stirring Bars and Rods Step-down transformer matched to a

Step-down transformer matched to a 35-watt sodium lamp on a 220V AC mains supply

Hand-painted dicot root transverse section model exposes epidermis

and standing waves visibly enough to compare amplitude

Life-size stomach model shows gastric fundus

Aluminum mounting pulley with a 2-inch (50mm) diameter wheel and a tapped hole sized for rods up to 13mm

Optically Worked Double Concave Glass Lens, 75mm Diameter, 500mm Focal Length Subcategory_Stirring Bars and Rods Step-down transformer matched to aVery long focal 75mm double concave glass lens at 500mm focal length, the gentle diverging curvature yielding subtler virtual image reduction for nuanced refraction work.