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Rh though to many persons patent specifications may be the driest of all dry reading, there is an infinitude of interesting matter to be found in those documents. Much of the trade history of the town is closely connected with the inventions of the patentees of last century, including such men as Lewis Paul, who first introduced spinning by rollers, and a machine for the carding of wool and cotton; Baskerville, the japaner; Wyatt, partner with Paul; Boulton, of Soho, and his coadjutors, Watt, Murdoch, Small, Keir, Alston, and others. Nothing has been too ponderous and naught too trivial for the exercise of the inventive faculties of our skilled workmen. All the world knows that hundreds of patents have been taken out for improvements, and discoveries in connection with steam machinery, but few would credit that quite an equal number relate to such trifling articles as buckles and buttons, pins and pens, hooks and eyes, &c.; and fortunes have been made even more readily by the manufacture of the small items than the larger ones. The history of Birmingham inventors has yet to be written; a few notes of some of their doings will be found under "Patents" and "Trades."

Iron.—In 1354 it was forbidden to export iron from England. In 1567 it was brought here from Sweden and Russia. A patent for melting iron with pit coal was granted in 1620 to Dud Dudley, who also patented the tinning of iron in 1661. The total make of iron in England in 1740 was but 17,000 tons, from 59 furnaces, only two of which were in Staffordshire, turning out about 1,000 tons per year. In 17S8 there were nine blast furnaces in the same county; in 1796, fourteen; in 1806, forty-two; in 1827, ninety-five, with an output of 216,000 tons, the kingdom's make being 690,000 tons from 284 furnaces. This quantity in 1842 was turned out of the 130 Staffordshire furnaces alone, though the hot-air blast was not used prior to 1835. Some figures have lately been published showing that the present product of iron in the world is close upon 19½ million tons per year, and as iron and its working-up has a little to do with the prosperity of Birmingham, we preserve them. Statistics for the more important countries are obtainable as late as 1881. For the others it is assumed that the yield has not fallen off since the latest figures reported. Under "other countries," in the table below, are included Canada, Switzerland, and Mexico, each producing about 7,500 tons a year, and Norway, with 4,000 tons a year:—

The first four countries produce 88.4 per cent. of the world's iron supply; the first two, 64.3 per cent.; the first, 43 per cent. The chief consumer is the United States, 29 per cent.; next Great Britain, 23.4 per cent.; these two using more than half of all. Cast iron wares do not appear to have been made here in any quantity before 1755; malleable iron castings being introduced about 1811. The first iron canal boat made its appearance here July 24, 1787. Iron pots were first tinned in 1779 by Jonathan Taylor's patented process, but we have no date when vessels of iron were first enamelled, though a French method of coating them with glass was introduced in 1850 by Messrs. T. G. Griffiths and Co. In 1809. Mr. Benjamin Cook, a well-known local inventor, proposed to use iron for building purposes, more particularly in