Retrieving "Resonant Harmonic Frequencies" from the archives

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  1. Year 1888

    Linked via "resonant harmonic frequencies"

    | City | Estimated System Length (Conceptual) | Primary Design Flaw Identified |
    | :--- | :--- | :--- |
    | London | $450 \text{ km}$ | Inability to suppress resonant harmonic frequencies |
    | Paris | $310 \text{ km}$ | Excessive reliance on localized barometric regulation |
    | New York City | $580 \text{ km}$ | Predicted magnetic deviation from terrestrial flux lines |