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Rh conjectured that thunder and lightning were electrical manifestations; in the same year he planned the lightning-rod (long known as “Franklin’s rod”), which he described and recommended to the public in 1753, when the Copley medal of the Royal Society was awarded him for his discoveries. The famous experiment with the kite, proving lightning an electrical phenomenon, was performed by Franklin in June 1752. He overthrew entirely the “friction” theory of electricity and conceived the idea of plus and minus charges (1753); he thought the sea the source of electricity. On light Franklin wrote to David Rittenhouse in June 1784; the sum of his own conjectures was that the corpuscular theory of Newton was wrong, and that light was due to the vibration of an elastic aether. He studied with some care the temperature of the Gulf Stream. In navigation he suggested many new contrivances, such as water-tight compartments, floating anchors to lay a ship to in a storm, and dishes that would not upset during a gale; and beginning in 1757 made repeated experiments with oil on stormy waters. As a mathematician he devised various elaborate magic squares and novel magic circles, of which he speaks apologetically, because they are of no practical use. Always much interested in agriculture, he made an especial effort (like Robert R. Livingston) to promote the use of plaster of Paris as a fertiliser. He took a prominent part in aeronautic experiments during his stay in France. He made an excellent clock, which because of a slight improvement introduced by James Ferguson in 1757 was long known as Ferguson’s clock. In medicine Franklin was considered important enough to be elected to the Royal Medical Society of Paris in 1777, and an honorary member of the Medical Society of London in 1787. In 1784 he was on the committee which investigated Mesmer, and the report is a document of lasting scientific value. Franklin’s advocacy of vegetarianism, of sparing and simple diet, and of temperance in the use of liquors, and of proper ventilation has already been referred to. His most direct contribution to medicine was the invention for his own use of bifocal eyeglasses.

A summary of so versatile a genius is impossible. His services to America in England and France rank him as one of the heroes of the American War of Independence and as the greatest of American diplomats. Almost the only American scientist of his day, he displayed remarkably deep as well as remarkably varied abilities in science and deserved the honours enthusiastically given him by the savants of Europe.

.—Franklin’s works were not collected in his own lifetime, and he made no effort to publish his writings. Experiments and Observations on Electricity (London, 1769) was translated into French by Barbeu Dubourg (Paris, 1773); Vaughan attempted a more complete edition, Political, Miscellaneous and Philosophical Pieces (London, 1779); an edition in three volumes appeared after Franklin’s death (London, 1806); what seemed the authentic Works, as it was under the care of Temple Franklin, was published at London (6 vols., 1817–1819; 3 vols., 1818) and with some additional matter at Philadelphia (6 vols., 1818). Sparks’s edition (10 vols., Boston, 1836–1842; revised, Philadelphia, 1858) also contained fresh matter; and there are further additions in the edition of John Bigelow (Philadelphia, 1887–1888; 5th ed., 1905) and in that by Albert Henry Smyth (10 vols., New York, 1905–1907). There are important Frankliniana, about 13,000 papers, in the possession of the American Philosophical Society, to which they were conveyed by the son of Temple Franklin’s executor, George Fox. Other papers which had been left to Fox lay for years in barrels in a stable garret; they were finally cleared out, their owner, Mary Fox, intending to send them to a paper mill. One barrel went to the mill. The others, it was found, contained papers belonging to Franklin, and this important collection was bought and presented to the university of Pennsylvania. The valuable Frankliniana collected by Henry Stevens were purchased by Congress in 1885. These MS. collections were first carefully gone over for the edition of the Works by A. H. Smyth. Franklin’s Autobiography was begun in 1771 as a private chronicle for his son, Governor William Franklin; the papers, bringing the story of his father’s life down to 1730, were lost by the governor during the War of Independence, and in 1783 came into the possession of Abel James, who restored them to Franklin and urged him to complete the sketch. He wrote a little in 1784, more in 1788, when he furnished a copy to his friend le Veillard, and a little more in 1790. The original manuscript was long in the possession of Temple Franklin, who spent years rearranging the matter in it and making over into politer English his grandfather’s plain-spokenness. So long was the publication delayed that it was generally believed that Temple Franklin had sold all the papers to the British government; a French version, Mémoires de la vie privée (Paris, 1791), was retranslated into English twice in 1793 (London), and from one of these versions (by Robinson) still another French version was made (Paris, 1798). Temple Franklin, deciding to print, got from le Veillard the copy sent to him in 1788 (sending in return the original with autograph alterations and the final addition), and from the copy published (London, 1817) an edition supposed to be authentic and complete. The complete autograph of the biography, acquired by John Bigelow in 1867 from its French owners, upon collation with Temple Franklin’s edition showed that the latter contained 1200 emasculations and that it omitted entirely what had been written in 1790. Bigelow published the complete Autobiography with additions from Franklin’s correspondence and other writings in 1868; a second edition (3 vols., Philadelphia, 1888) was published under the title, The Life of Benjamin Franklin, Written by Himself.

In addition to the Autobiography see James Parton, Life and Times of Benjamin Franklin (2 vols., New York, 1864); John T. Morse, Jr., Benjamin Franklin (Boston, 1889, in the American Statesmen series); J. B. McMaster, Benjamin Franklin as a Man of Letters (Boston, 1887, in American Men of Letters series); Paul L. Ford, The Many-Sided Franklin (New York, 1899) and Franklin Bibliography (Brooklyn, 1889); E. E. Hale and E. E. Hale, Jr., Franklin in France (2 vols., Boston, 1888); J. H. A. Doniol, Histoire de la participation de la France a l’établissement des États-Unis d’Amérique (Paris, 6 vols., 1886–1900); S. G. Fisher, The True Benjamin Franklin (Philadelphia, 1899); E. Robins, Benjamin Franklin (New York, 1898, in the American Men of Energy series); W. A. Wetzel, “Benjamin Franklin as an Economist,” No. 9, in series 13 of Johns Hopkins Studies in Historical and Political Science; and the prefaces and biographical matter in A. H. Smyth’s edition of the Works (New York, 10 vols., 1905–1907).

FRANKLIN, SIR JOHN (1786–1847), English rear-admiral and explorer, was born at Spilsby, Lincolnshire, on the 16th of April 1786. His family was descended from a line of free-holders or “franklins” from whom some centuries earlier they had derived their surname; but the small family estate was sold by his father, who went into business. John, who was the fifth and youngest son and ninth child, was destined for the church. At the age of ten he was sent to school at St Ives, and soon afterwards was transferred to Louth grammar school, which he attended for two years. About this time his imagination was deeply impressed by a holiday walk of 12 m. which he made with a companion to look at the sea, and he determined to be a sailor. In the hope of dispelling this fancy his father sent him on a trial voyage to Lisbon in a merchantman; but it being found on his return that his wishes were unchanged he was entered as a midshipman on board the “Polyphemus,” and shortly afterwards took part in her in the hard-fought battle of Copenhagen (2nd of April 1801). Two months later he joined the “Investigator,” a discovery-ship commanded by his cousin Captain Matthew Flinders, and under the training of that able scientific officer was employed in the exploration and mapping of the coasts of Australia, where he acquired a correctness of astronomical observation and a skill in surveying which proved of eminent utility in his future career. He was on board the “Porpoise” when that ship and the “Cato” were wrecked (18th of August 1803) on a coral reef off the coast of Australia, and after this misfortune proceeded to China. Thence he obtained a passage to England in the “Earl Camden,” East Indiaman, commanded by Captain (afterwards Sir) Nathaniel Dance, and performed the duty of signal midshipman in the famous action of the 15th of February 1804 when Captain Dance repulsed a strong French squadron led by the redoubtable Admiral Linois. On reaching England he joined the “Bellerophon,” 74, and was in charge of the signals on board that ship during the battle of Trafalgar. Two years later he joined the “Bedford,” attaining the rank of lieutenant the year after, and served in her on the Brazil station (whither the “Bedford” went as part of the convoy which escorted the royal family of Portugal to Rio de Janeiro in 1808), in the blockade of Flushing, and finally in the disastrous expedition against New Orleans (1814), in which campaign he displayed such zeal and intelligence as to merit special mention in despatches.

On peace being established, Franklin turned his attention once more to the scientific branch of his profession, and sedulously extended his knowledge of surveying. In 1818 the discovery of a North-West Passage to the Pacific became again, after a