"VWR International"

Dissect this colorful model into two parts to closely examine blood vessels in the heart. Two times larger than life-size, the model clearly reveals the structure of auricles and ventricle on the diaphragm.

Made from fine, oil finished hardwood designed to support up to four funnels. The height is adjustable and the holes are slotted for easy placement of funnels. The base measures 11 x 38 cm.

Study the motion and behavior of gas molecules with this intriguing demonstration. An electric motor, running at 4 to 12 V DC, vibrates a small platform inside a transparent tube. This platform then violently vibrates the many small stainless steel balls inside the tube.

An excellent apparatus for showing the function of parts in an AC or DC motor and generator. Operates as either a shunt-wound or series motor. The unit is similar to the St. Louis Motor. Included with the motor are a powerful horseshoe magnet and an electromagnet.

The E.H.T circuits on this digital power supply are fully floating, enabling the positive and negative terminals to be grounded for certain applications.

With the magnet is on the outside, it's easy to see the science behind these eddy tubes.

Smooth-running ball-bearing clamp pulley for use with inclined planes, force experiments, or demonstrations of work and machines, this durable, lightweight plastic pulley fastens to surfaces up to 18 mm thick.

This is made of polyethylene and the dimeter of the stirring bar is ³/₈ inch and the length is 12 inch.

Museum mounts are the ideal supplement for classroom dissection.

This corrosion-proof polypropylene basket is ideal for rinsing glassware — simply slide the lid on, rinse, and invert for easy draining. The basket holds test tubes for storage, sterilization, or incubation. Autoclavable to 121°C. Size: 17 x 17 x 16cm.

To explore light reflection and refraction properties of concave and convex mirrors, laws of reflection, image formation, the effects of surface curvature on reflection, spherical aberration, etc. Each mirror is securely held on a plastic base. The diameter of each mirror is approximately 95mm.

Formalin preserved bullfrogs Available in vacuum packs or pails.

Formalin preserved bullfrogs Available in vacuum packs or pails.

Appropriate for grades 6 to 12 Brings the First Law of Thermodynamics to life! This pair of precision-machined, chrome-plated steel balls is actually a hands-on demonstration in energy transformation. By striking the balls together, you will create enough heat at the point of contact to burn a hole in a sheet of paper.

Economical and compact, this microtube rack comes pre-assmbeled and ready to hold up to twenty-four 1.5–2.0 ml microtubes. Its clearly labeled holes make sample identification easy, while its compact design saves benchspace and makes for easy storage.

A set of 15 samples of different materials used to challenge students to identify materials based on measurement of their density. For some specimens this will be straightforward. In other cases, it will lead to a discussion of uncertainty in measurements and data, and to an awareness that different materials may have nearly the same density.