Brass samovar tap and stone tool: what they have in common

1. Step 1. Brass samovar tap — is part of — Samovar. A tap for pouring.
2. Step 2. Samovar — uses — Combustion. Charcoal in the chimney.
3. Step 3. Combustion — is used in — Boiler. The firebox heats the water.
4. Step 4. Boiler — is part of — Steam hammer. A boiler supplies the steam.
5. Step 5. Steam hammer — evolved from — Hammer. A steam hammer is a hammer lifted by steam, used to forge huge parts.
6. Step 6. Hammer — evolved from — Stone tool. The first hammer was a stone in the hand.

Open Evothings