Francisco Salva Campillo read in December 16th, 1795 before the Academy of Sciences in Barcelona the paper «On the application of electricity to telegraphy». This is probably one of the first suggestions on the possibility of wireless telegraphy, as it is recorded in the first books written about the history of wireless. An account of Salva’s contributions to telegraphy and his proposal of wireless telegraphy is presented.
El médico, físico y globista Francisco Salvá y Campillo lee en la Real Academia de Medicina de Barcelona su memoria titulada «La electricidad aplicada a la telegrafía»
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Una respuesta a «El médico, físico y globista Francisco Salvá y Campillo lee en la Real Academia de Medicina de Barcelona su memoria titulada «La electricidad aplicada a la telegrafía»»
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R. Victor Jones < Paul DeMarinis:
The idea of the electrical telegraph tickled many a great mind on its way to realization. Among them was the Catalan scientist Don Francisco Salvá i Campillo. Though something of a sideline for this polymath, his proposals were significant in a number of ways. They are of particular interest because, spanning as they do from the era of the revolution to the defeat of Napoleon, they reflect, in the spirit of their mechanisms, the transitions of social franchise during this period. Salvá’s first proposal is similar to the one described in Scot’s Magazine. It uses a separate wire for each letter of the alphabet, a Leyden jar to transmit a spark across these wires, but peculiarly, instead of the pith ball electroscopes and indicators, Salvá specifies a number of people, one for each wire. Upon receiving a sensible shock, each of these people, presumably servants, was to call out the name of the letter of the alphabet to which he corresponded. A twenty seventh person, presumably literate, was to write down the message so shockingly spelled out. This is probably the system that Salvá operated between Madrid and Aranjuez in 1798. Whether Salvá’s abandonment of pith-ball electroscopes in favor of human receivers was due to problems with electrical dissipation in the moister climate of Barcelona, a cheaper labor pool, or the relative ease of transcription of 26 vocal sources into a coherent message are questions that only further researches into his work might reveal. Nonetheless, the scene of a hall filled with the sighs, whispers and moans of humanity being shocked into literacy seems an appropriate and emblematic image for the events of 1789.
The use of electricity for the communication of messages began with the telegraph. An electric current is able to flow along a wire and arrive almost instantaneously at its destination. The first known suggestion for an electric telegraph was made in 1753 by Charles Morrison, a Scottish surgeon. It involved 26 wires, one for each letter of the alphabet, which could carry a discharge of electricity and attract a piece of paper representing a letter to an electrified ball where the message was to be received. In 1804 Francisco Salva in Spain, using an electric battery and a similar system of multiple wires as was proposed by Morrison sent messages up to a kilometer
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