Cartesian coordinates and telephone: what they have in common

1. Step 1. Cartesian coordinates — uses — Euclidean geometry. Analytic geometry.
2. Step 2. Euclidean geometry — is used in — Weather station. Instruments are set up on a site according to a standard.
3. Step 3. Weather station — is used in — Weather forecast. Observations.
4. Step 4. Weather forecast — uses — Electrical telegraph. Collecting reports by telegraph.
5. Step 5. Electrical telegraph — evolved into — Telephone. The telephone grew out of attempts to send several signals over telegraph lines (the “harmonic telegraph”).

Open Evothings