Set of brass weights and davy lamp: what they have in common

1. Step 1. Set of brass weights — is part of — Balance scale. Reference masses.
2. Step 2. Balance scale — is made of — Stone. Weights were hewn from stone.
3. Step 3. Stone — is material for — Oil lamp. The first lamps were stone bowls (Lascaux).
4. Step 4. Oil lamp — has part — Wick. The wick feeds oil to the flame.
5. Step 5. Wick — is part of — Davy lamp. A wick.

Open Evothings