Hyman Fire Piston Languages The Metal Earth line of

The Metal Earth line of miniatures are purchased as 2 sheets of 11cm square

The free-standing fraction flip chart features 4 sets of flips

~ an extension activity

a hobbyist can complete this model in a single sitting

and release the marbles with the Tip Tube

Hyman Fire Piston Languages The Metal Earth line ofThe Hyman Fire Piston is an informative piece of kit that demonstrates the rise in temperature that is produced when a fixed mass of gas is compressed. In this apparatus the contained air is compressed by a hand operated piston. The heat generated is sufficient to ignite a small quantity of tinder supported inside the transparent cylinder. Suitable tinder is included, but almost any organic material will work if dry enough, i. e. cotton, charcoal,