Tests the pH of the soil so that you can determine which plants suit your soil pH and how you may alter soil pH to suit certain plants.

Plastic Sterile inoculation loop with streaker tip. Overall length is 8 inches (20 cm). They are individually wrapped in sterile packs. Middle section or handle is textyred for better grip. The loop capacity is 10 micro liters.

This wooden clamp can be used for tubes from 10mm to 19mm. With a steel spring. Jaws open by thumb presure. Smooth finish. Length about 180mm

Life-size, adult skull features a movable jaw and removable calvarium. May have missing teeth. Size: 5"w x 8-1/2"h x 6"d. This 4th quality skull may be imperfect, discolored, unfinished or may have missing hardware.

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.