THREE:Lord Palmerston and Mr. Poulett Thompson treated the apprehensions of Lord Dudley Stuart as visionary, and expressed their conviction that there was nothing in the conduct of the Czar to excite either alarm or hostility in Great Britain. Their real opinions were very different. A few days later an event occurred which showed how little Russia was to be relied upon; and that it was impossible to restrain her aggressive propensities, even by the most solemn treaty obligations, undertaken in the face of Europe, and guaranteed by the Great Powers. Cracow, which comprised a small territory about 490 square miles in extent, with a population of about 123,000, including the city, was at the general settlement in 1815 formed into a free State, whose independence was guaranteed by the Treaty of Vienna in the following terms:"The town of Cracow, with its territory, is declared to be for ever a free, independent, and strictly neutral city, under the protection of Russia, Austria, and Prussia." During the insurrection of Poland in 1830 the little State of Cracow could not repress its sympathies, and the news of the outbreak was received there with the greatest enthusiasm. After the destruction of the Polish army, persons who were compromised by the revolt sought an asylum in Cracow; and 2,000 political refugees were found settled there in 1836. This served as a pretext for the military occupation of the city in February of that year, notwithstanding the joint guarantee that it should never be entered by a foreign army. This was only a prelude to the ultimate extinction of its independence, which occurred ten years later. Lord Palmerston launched a vigorous protest, but it had no result.The employment of pit-coal had not reached perfection, and in 1785 the Society of Arts offered a premium for the making of fine bar iron with pit-coal. This object was accomplished by Mr. Cort, an iron-founder of Gloucestershire, by exposing the pig iron on the hearth of a reverberatory furnace to the flame of pit-coal. This process was improved into what was called puddling, in puddling or reverberatory furnaces. Cort also introduced the drawing out of iron between cylindrical rollers; but he became ruined in his experiments, and other iron-masters of more capital came in to reap the profit. Many years passed before a pension was conferred on some of his children for his services. In 1755 the whole population of Carron was only one thousand eight hundred and sixty-four; in 1795 the workmen alone employed in the works were one thousand, the population four thousand, when the foundry had five blast furnaces, sixteen air furnaces, three cupola furnaces, and consumed one hundred and thirty-six tons of coals daily. It supplied to the Government eleven thousand tons annually of cannon, mortars, shot, shells, etc.; to the East India Company six thousand tons; and to all customers together twenty-six thousand tons. The growth of the iron trade in Great Britain, through these improvements, may be seen from the fact that in 1802 there were one hundred and sixty-eight blast furnaces, producing two hundred and twenty thousand tons of iron; in 1820 the annual production of iron was four hundred thousand tons; in 1845 the production was calculated at twice that amountthat is, in twenty-five years the production had doubled itself. In 1771 the use of wire ropes, instead of hempen ones, was suggested by M. Bougainville, and this was made a fact by Captain Brown, in 1811. Before this, in 1800, Mr. Mushet, of Glasgow, discovered the art of converting malleable iron, or iron ore, into cast steel; and in 1804 Samuel Lucas, of Sheffield, further extended the benefit by the discovery of a mode[198] of converting any castings from pig iron at once into malleable iron, or cast steel, so that knives, forks, snuffers, scythes, and all kinds of articles, were converted into steel, "without any alterative process whatever between the blast furnace and the melting-pot." In 1815 it was calculated that two hundred thousand persons were employed in manufacturing articles of iron, the annual value of which was ten million pounds.