Gram staining and bell: what they have in common

1. Step 1. Gram staining — uses — Microscope. For microscopy.
2. Step 2. Microscope — evolved into — Electron microscope. Overcoming the limit of optics.
3. Step 3. Electron microscope — uses — Electromagnet. Magnetic lenses.
4. Step 4. Electromagnet — is part of — Electric bell. An electromagnet strikes a small hammer.
5. Step 5. Electric bell — is part of — Alarm clock. A bell.
6. Step 6. Alarm clock — has part — Bell. A bell rings.

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