RUINS OF FIEDBAS NEGRAS.—ALTAR WITH HIEROGLYPHIC INSCRIPTION … FIEDRAS NEGRAS.—SCULPTURED LINTEL FROM DOORWAY OF BUILDING coherer, MM. Guarini, Cesar, and Poncelet were en-abled to receive signals, but at much shorter distances.The system in which telegraph wires are employedmight, M. Guarini thinks, prove an economical meansof constituting a block system with…
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