Pitt had some time before (1785) offered a commercial partnership, which had been rejected on the ground that it involved the ultimate right of England to tax Ireland.
At the age of nineteen, he was articled for five years as clerk to the master of a school in Spital Square, London, with whom at the end of that time he entered into partnership. In 1750 he read a paper before the Royal Society on a method of making artificial magnets, which procured him election as a fellow of the society and the award of the Copley medal.
The abandonment of the communal system was begun in the latter year, and with the dissolution of the partnership with the adventurers of the London Company in 1627 Plymouth became a corporate colony with its chief authority vested in the whole body of freemen convened in the General Court.
In 1730 the partnership was dissolved, and Franklin, through the financial assistance of two friends, secured the sole management of the printing house.
In conjunction with Josiah Latimer Clark, with whom he entered into partnership in 1861, he invented improved methods of insulating submarine cables, and a paper on electrical standards read by them before the British Association in the same year led to the establishment of the British Association committee on that subject, whose work formed the foundations of the system still in use.