Incandescent gas mantle and plough: what they have in common

1. Step 1. Incandescent gas mantle — is part of — Gas lamp. The Welsbach mantle glows in the flame (from the 1890s).
2. Step 2. Gas lamp — evolved into — Street light. Gas lamps.
3. Step 3. Street light — is part of — Tunnel. Lighting.
4. Step 4. Tunnel — uses — Chisel. Hezekiah’s Tunnel was cut by hand with chisels.
5. Step 5. Chisel — has part — Handle. A wooden or plastic handle.
6. Step 6. Handle — is part of — Plough. Handles for steering the plough.

Open Evothings