Needle eye and heron’s aeolipile: what they have in common

1. Step 1. Needle eye — is part of — Needle. A hole for the thread.
2. Step 2. Needle — is part of — Syringe. A hollow needle.
3. Step 3. Syringe — works like — Piston pump. A syringe is a hand-operated piston pump.
4. Step 4. Piston pump — is used in — Greek fire. It was projected by a siphon pump.
5. Step 5. Greek fire — uses — Combustion. It burns even on water.
6. Step 6. Combustion — is used in — Heron’s aeolipile. A fire boils the water in the cauldron.

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