Replacement Cylindrical Lens for Sliding Ray Box Lab Supplies_Weights & Masses and other laboratory glassware in

and other laboratory glassware in fluid transfer setups

the shorter focal distance lifting magnification for fine-print and specimen detail work

Hand microtome produces thin specimen sections for microscope slide preparation in botany

Low-voltage DC motor with a current-limiting series resistor on a demonstration base with 4mm plug connections

Replacement Cylindrical Lens for Sliding Ray Box Lab Supplies_Weights & Masses and other laboratory glassware inSingle axis focusing geometry of this cylindrical lens lets students see how a curved surface forms line images, supplied as a replacement for the matching sliding ray box.