The evidence of Mr. Brunel, and of Mr. Lawson, the printer of _The Times_, proved the invention of the Fourdriniers to be one of the most splendid discoveries of the age. Mr. Lawson stated that the conductors of the metropolitan newspapers could never have presented to the world such an immense mass of news and advertisements as was now contained in them, had not this invention enabled them to make use of any size required. By the revolution of the great cylinder employed in the process, an extraordinary degree both of rapidity and convenience in the production is secured. One of its chief advantages is the prevention of all risk of combination among the workmen, the machine being so easily managed that the least skilful person can attend to it. It was added that the invention had caused a remarkable increase in the revenue: in the year 1800, when this machine was not in existence, the amount of the paper duty was 195,641_l._; in 1821, when the machinery was in full operation, the amount of duty was 579,867_l._; in 1835, it was 833,822_l._ No doubt, part of this increase must be set down to other causes; still, it was impossible but for this discovery, that such a quantity of paper could have been made and consumed. The positive saving to the country effected by it, had not been less than 8,000,000_l._; the increase in the revenue not less than 500,000_l._ a-year. At length, in May, 1840, the sum of 7,000_l._ was voted by Parliament to Messrs. Fourdrinier, as some compensation for their loss by the defective state of the patent law. There has been made by this machinery at Colinton mills, a single sheet of paper weighing 533 lbs., and measuring upwards of a mile and a half in length, the breadth being only 50 inches. Were a ream of paper of similar sheets made, it would weigh 266,500lbs. or upwards of 123 tons. ------------------ THE COCOA-NUT CRAB.