the Royal Society was not yet printed or circulated. The consequence was that two Italian physicists, MM. Nobili and Antinori, seeing the brief letter, and “considering that the subject was given to the philosophical world for general pursuit,” immediately began researches on magneto-electric induction in ignorance of Faraday’s full work. Their results they embodied in a paper, in which they claimed to have “verified, extended, and, perhaps, rectified the results of the English philosopher,” accusing him of errors both in experiment and theory, and even of a breach of good faith as to what he had said about Arago’s rotations. This paper they dated January 31st, 1832; but it was published in the belated number of the _Antologia_ for November, 1831, where its appearance at an apparently earlier date than Faraday’s original paper in the _Philosophical Transactions_ made many Continental readers suppose that the researches of Nobili and Antinori preceded those of Faraday. In June, 1832, Faraday published in the _Philosophical Magazine_ a translation of Nobili’s memoir, with his own annotations; and later in the year he wrote to Gay Lussac a long letter on the errors of Nobili and Antinori. He showed how, in spite of his efforts to clear up the misunderstanding, in spite of his having sent several months previously to MM. Nobili and Antinori copies of his original papers, no correction or retractation had been made by them; and he concluded by a dignified protest that none might say he had been too hasty to write that which might have been avoided. It may be taken that the rule now recognised as to priority of scientific publication--namely, that it dates from the day when the discoverer communicates it formally to any of the recognised learned societies--was virtually established by Faraday’s example. It will be remembered that writing to De la Rive in 1845, to tell him of his diamagnetic discoveries, he begged him to keep the matter secret, adding: “I ought (in order to preserve the respect due to the Royal Society) not to write a description to any one until the paper has been received or even read there.” To younger men he inculcated the necessity of proper and prompt publication of their researches if they would reap the benefit of their work. To Sir William Crookes, then a rising young chemist, he said: “Work, Finish, Publish.” Writing in 1853 to Professor Matteucci, who had been annoyed with him for allowing Du Bois Reymond, with whom Matteucci had had some controversy about priority, to dedicate his book to him, Faraday says: “Who has not to put up in his day with insinuations and misrepresentations in the accounts of his proceedings given by others, bearing for the time the present injustice, which is often unintentional, and often originates in hasty temper, and committing his fame and character to the judgment of the men of his own and future time?”... “I see that that moves you which would move me most--namely, the imputation of a want of