Scythe blade and jacquard loom: what they have in common

1. Step 1. Scythe blade — is part of — Scythe. A long curved blade.
2. Step 2. Scythe — evolved into — Lawn mower. The mechanization of mowing.
3. Step 3. Lawn mower — has part — Gear. The wheels turn the blade cylinder through gears.
4. Step 4. Gear — is part of — Babbage’s Analytical Engine. Gears performed the calculations.
5. Step 5. Babbage’s Analytical Engine — was inspired by — Jacquard loom. Babbage borrowed Jacquard’s punched cards directly for entering operations and data; Ada Lovelace compared the machine to the Jacquard loom.

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