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Again, the discovery of voltaic electricity, and the marvellous development of knowledge, in that field, effected by such men as Davy, Faraday, Oersted, Ampère, and Melloni, had brought to light a number of facts which tended to show that the so-called 'forces' at work in light, heat, electricity, and magnetism, in chemical and in mechanical operations, were intimately, and, in various cases, quantitatively related.
And Franciscus Lopez de Gomera, in his Generall Historie of the Indies, fol. 297. and 298. in treatinge of the seconde voyadge of Franciscus Vasques de Coronado from Ceuola to Tigues, from Tigues to Cicuic, and from Cicuic to Quiuira, saieth firste of the contrye about Tigues: Ci sono in quel paese melloni, e cottone bianco e rosso, del quale fanno piu larghi mantelli, che in altre bande delle Indie.
The moon's formations are thus not only delineated under every variety of light-incidence, but their meaning is sought to be elicited, and their history and mutual relations interpreted. Henceforth, at any rate, the lunar volcanoes can scarcely, without notice taken, breathe hard in their age-long sleep. Melloni was the first to get undeniable heating effects from moonlight.
And of Quiuira he saieth: è Quiuira in quaranta gradi, è paese temperato di bonissime acque, di molto herbatico, prugne, more, noci, melloni ed vue che maturanno benissimo; e vestono pelle di vacche e caprioli; uiddero per la costa navi che portavano arcatrarzes di oro ed argento per le proe, con mercantie, e credettero ch’erano del Cataio e China: per chè accennavano, che havevano nauigato trenta dì.
Thus about fifty years ago OErsted, of Copenhagen, discovered the deflection of a magnetic needle by an electric current; and about the same time Thomas Seebeck, of Berlin, discovered thermoelectricity. These great discoveries were soon afterwards turned to account, by Nobili and Melloni, in the construction of an instrument which has vastly augmented our knowledge of radiant heat.
The subject was subsequently followed up by Melloni, an investigator of consummate ability, who sagaciously turned to account his own discovery, that the obscure rays of luminous sources are in part transmitted by black glass.
Here he found the temperature actually higher than in any part of the visible spectrum. By this important observation, he proved that the sun emitted heat-rays which are entirely unfit for the purposes of vision. The subject was subsequently taken up by Seebeck, Melloni, Müller, and others, and within the last few years it has been found capable of unexpected expansions and applications.
At one table sat Mary Somerville, Leverrier, Adams, La Place, Gauss and Helmholz; at another Dalton, Schonbeim, Davy, Tyndall, Berthollet, Berzelius, Priestly, Lavoisier, and Liebig; here were groups of physicists Faraday, Volta, Galvani, Ampere, Fahrenheit, Henry, Draper, Biot, Chladini, Black, Melloni, Senarmont, Regnault, Daniells, Fresnel, Fizeau, Mariotte, Deville, Troost, Gay-Lussac, Foucault, Wheatstone, and many, many more.