REPORT OF MR. ROBERT B. LINES.

451

tion, has been lately adopted by the Chemin de fer du Nord of France, and is exhibited in the case of the Administration des Télégraphes , in the French department, with other appa­ratus of the same manufacturers, Digney frères, of Paris. It

Plate VIII.

L—Line wires.

T—Ground wires.

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