Sulfonamides and screw press: what they have in common

1. Step 1. Sulfonamides — evolved from — Synthetic dye. Prontosil was a red dye.
2. Step 2. Synthetic dye — is made of — Coal. Aniline from coal tar.
3. Step 3. Coal — is used in — Watt steam engine. Steam engines were fired with coal.
4. Step 4. Watt steam engine — is part of — Rotary printing press. The first rotary presses were steam-driven.
5. Step 5. Rotary printing press — evolved from — Gutenberg printing press. Cylinders instead of a flat press.
6. Step 6. Gutenberg printing press — has part — Screw press. Gutenberg adapted the screw press known from pressing grapes.

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