Means of communication and shaduf: what they have in common

1. Step 1. Means of communication — includes — Electrical telegraph. A means of sending messages.
2. Step 2. Electrical telegraph — is used in — Time zones. Synchronizing time by telegraph.
3. Step 3. Time zones — was inspired by — Railway track. Introduced because of railway timetables.
4. Step 4. Railway track — is used in — Funicular. Rails.
5. Step 5. Funicular — uses — Counterweight. The cars balance each other.
6. Step 6. Counterweight — is used in — Shaduf. The counterweight makes lifting the bucket easier.

Open Evothings