Sundial gnomon and hydraulic press: what they have in common

1. Step 1. Sundial gnomon — is part of — Sundial. A rod that casts a shadow.
2. Step 2. Sundial — is made of — Stone. Sundials were hewn from stone.
3. Step 3. Stone — is material for — Hammer. The first hammer was a hammerstone, later mounted on a handle.
4. Step 4. Hammer — evolved into — Steam hammer. A steam hammer is a hammer lifted by steam, used to forge huge parts.
5. Step 5. Steam hammer — evolved into — Forging press. Pressing instead of striking.
6. Step 6. Forging press — is a kind of — Hydraulic press. A press.

Open Evothings