Zoetrope picture strip and saw: what they have in common

1. Step 1. Zoetrope picture strip — is part of — Zoetrope. Successive phases of motion.
2. Step 2. Zoetrope — evolved into — Cinema. Optical toys prepared the idea of cinema.
3. Step 3. Cinema — uses — Cinématographe. Cinema began with the cinématographe.
4. Step 4. Cinématographe — has part — Crank. The film was advanced by turning a handle.
5. Step 5. Crank — is part of — Sawmill. A crank turns the wheel’s rotation into the stroke of the saw.
6. Step 6. Sawmill — uses — Saw. The cutting tool is a saw.

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