Raincoat and watt steam engine: what they have in common

1. Step 1. Raincoat — is made of — Waterproof fabric. Rubberized fabric.
2. Step 2. Waterproof fabric — is made of — Natural rubber. Rubber between the layers.
3. Step 3. Natural rubber — is material for — Spray bottle. A rubber bulb.
4. Step 4. Spray bottle — has part — Piston pump. A hand pump.
5. Step 5. Piston pump — evolved into — Watt steam engine. The first steam engines (Newcomen’s) pumped water out of mines by driving pumps.

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