Chisel and watt steam engine: what they have in common

1. Step 1. Chisel — is used in — Tunnel. Hezekiah’s Tunnel was cut by hand with chisels.
2. Step 2. Tunnel — uses — Rock drill. Driving the Mont Cenis tunnel.
3. Step 3. Rock drill — has part — Piston. A percussion piston.
4. Step 4. Piston — is part of — Watt steam engine. Steam pushes the piston in the cylinder.

Open Evothings