"VWR International"

An excellent set of materials for demonstrating electromagnetism and induced currents, the set includes two electromagnetic coils mounted on plastic saddle blocks, round and square iron cores, split round iron cores, a double core, and a card for showing lines of force. Set of two.

Formalin preserved bullfrogs Available in vacuum packs or pails.

Formalin preserved bullfrogs Available in vacuum packs or pails.

Electrostatic charges are indicated by the deflection of a black plastic straw pivoted on a pin. The polished zinc plate on top is used to demonstrate photoelectric effect and various other electrostatic demonstrations. The metal case measures 14 cm in diameter. The scale is graduated in 10° increments in two quadrants.

Museum mounts are the ideal supplement for classroom dissection.

This working model thermostat will demonstrate how differential expansion is used to control temperature. A bimetallic strip is used to open or close an electric circuit when temperature changes. The contacts will carry about three amperes. The unit can be operated with a 6 V lantern battery, low voltage power supply, or a blow dryer. Mounted on a metal base; approximately 15 cm high.

Museum mounts are the ideal supplement for classroom dissection.

Museum mounts are the ideal supplement for classroom dissection.

Museum mounts are the ideal supplement for classroom dissection.

Perfect for any style alcohol lamp, this stand can be used in two different height levels (9 or 13 cm) by simply removing the wire gauze top, turning the stand on its side, and putting the top back on. It is constructed of stainless steel rod with an 8 x 10 cm wire gauze surface. The edges of the wire gauze are turned under for safety.

Museum mounts are the ideal supplement for classroom dissection.

Museum mounts are the ideal supplement for classroom dissection.

Museum mounts are the ideal supplement for classroom dissection.

Museum mounts are the ideal supplement for classroom dissection.

Museum mounts are the ideal supplement for classroom dissection.

Museum mounts are the ideal supplement for classroom dissection.