K_{σ} = F_{σμ} ∂F_{μν}/∂_x__{ν}

= ∂/∂_x__{ν} (F_{σμ} F^{μν}) - F^{μν} ∂F_{σμ}/∂_x__{ν}.

On account of (60) the second member on the right-hand side admits of

the transformation—