For studying biological and geological specimens where focusing is not required, particularly suitable in elementary schools. Comprised of a large wooden tripod with screw-in angled legs, fitted with a plano-convex glass lens of diameter about 100mm. Magnification 2X. Height approximately 250mm. Prefocused. 

Suitable for examining specimens on uneven surfaces. Comprised of a plano-convex lens, diameter about 100mm, mounted in a hexagonal metal frame with three metal arms which are free to pivot in a circular path. Telescopic metal legs with rubber feet are fitted at the end of each swivel. Overall width approximately 190mm. 

For use on the laboratory table. Suitable for elementary biology laboratory, dissections and for closer examination of specimens. Consists of a pair of plano-convex lenses mounted in a black plastic frame, metal legs and a ring. The aperture is 18mm and magnification is 10X. Focused by up and down screw movement. Undistorted field.