Cabæus was the first to observe electrical repulsion, and he thus announces his discovery in the tenth chapter of the above-named work: “Magnetic attractions and repulsions are physical actions which take place through the instrumentality of a certain quality of the intermediate space, said quality extending from the influencing to the influenced body.... Bodies are not moved by sympathy or antipathy, unless it be by means of certain forces which are uniformly diffused. When these forces reach a body that is suitable they produce changes in it, but they do not sensibly affect the intermediate space nor the non-kindred bodies close by it....” The “Philosophia Magnetica” is the second Latin book published on electricity, Gilbert’s “De Magnete” being the first. REFERENCES.--Becquerel, “Résumé,” Chap. III; Stuello, “Bibl. Scrip. S. J.,” Rome, 1676; Francisco de Lanis, “Magist. nat. et artis,” 1684; L. L. de Vallemont, “Description de l’aimant,” 1692, pp. 167, 170; Dechales C. F. Milliet, “Cursus seu Mundus Mathem.,” 1674, 1690. =A.D. 1632.=--Sarpi (Pietro)--Fra Paolo Sarpi--Father Paul--Paulus Venetus--Paolo Sarpi Veneto (_b._ 1552, _d._ 1623), who was the author of the celebrated history of the Council of Trent (“the rarest piece of history the world ever saw”) is referred to by Gilbert in “De Magnete,” Book I. chap. i. Therein, he says that Baptista Porta, who has made the seventh book of his “Magia Naturalis” a very storehouse and repertory of magnetic wonders, knows little about the movements of the loadstone and never has seen much of them, and that a great deal of what he has learned about its obvious properties, either through Messer Paolo, the Venetian, or through his own studies, is not very accurately noted and observed. In the introduction to the 1658 edition of his “Natural Magick,” Porta admits that he gained some knowledge of Sarpi, who, says he, is of all men he ever knew the most learned and skilful and the ornament and splendour not only of Venice or of Italy, but of the entire world. Bertelli refers (“Memor. sopra P. Peregrino,” p. 24, note) to P. Garbio’s “Annali di Serviti,” Lucca, 1721, Vol. II. pp. 263, 272, 274, and to Fra Fulgenzio Micanzio’s “Life of Sarpi,” Helmstat--Verona, 1750, in which it is stated that not only Porta but likewise a celebrated _ultramontane_ studied magnetism under him. Garbio asks: “Could this _ultramontane_ be Gilbert of Colchester?” By Griselini (“Vita de Fra P. Sarpi”--memoria anecdote--Lausanne, 1760), Paolo is said to have written a treatise on the magnet and to have therein recorded many observations, including the earliest mention that magnetic properties are destroyed by fire.