Hygrometer and chisel: what they have in common

1. Step 1. Hygrometer — is made of — Plant fibre. Humidity was shown by a fibre that changed length.
2. Step 2. Plant fibre — is material for — Toothbrush. The bristles were hog hair, later nylon.
3. Step 3. Toothbrush — has part — Handle. A plastic handle.
4. Step 4. Handle — is part of — Chisel. A wooden or plastic handle.

Open Evothings