Machine table and needle: what they have in common

1. Step 1. Machine table — is part of — Milling machine. It moves the workpiece.
2. Step 2. Milling machine — has part — Gear. A gear train drives the feed.
3. Step 3. Gear — is part of — Lawn mower. The wheels turn the blade cylinder through gears.
4. Step 4. Lawn mower — evolved from — Sickle. Mechanized mowing.
5. Step 5. Sickle — evolved from — Stone tool. The first sickles had flint inserts.
6. Step 6. Stone tool — evolved into — Needle. Bone needles with an eye are part of the Palaeolithic toolkit.

Open Evothings