From this calculation it would appear,- -not taking wooden or cork legs into the account, but allowing two legs to every person,--that ten thousand individuals (one-half of the whole population) were either destitute of any rest for their legs at all, or passed the whole of their leisure time in sitting upon boxes.

'SECTION D.--MECHANICAL SCIENCE. COACH-HOUSE, ORIGINAL PIG.

President--Mr. Carter. Vice-Presidents--Mr. Truck and Mr. Waghorn.

'PROFESSOR QUEERSPECK exhibited an elegant model of a portable railway, neatly mounted in a green case, for the waistcoat pocket. By attaching this beautiful instrument to his boots, any Bank or public-office clerk could transport himself from his place of residence to his place of business, at the easy rate of sixty-five miles an hour, which, to gentlemen of sedentary pursuits, would be an incalculable advantage.

'THE PRESIDENT was desirous of knowing whether it was necessary to have a level surface on which the gentleman was to run.

'PROFESSOR QUEERSPECK explained that City gentlemen would run in trains, being handcuffed together to prevent confusion or unpleasantness. For instance, trains would start every morning at eight, nine, and ten o'clock, from Camden Town, Islington, Camberwell, Hackney, and various other places in which City gentlemen are accustomed to reside. It would be necessary to have a level, but he had provided for this difficulty by proposing that the best line that the circumstances would admit of, should be taken through the sewers which undermine the streets of the metropolis, and which, well lighted by jets from the gas pipes which run immediately above them, would form a pleasant and commodious arcade, especially in winter-time, when the inconvenient custom of carrying umbrellas, now so general, could be wholly dispensed with. In reply to another question, Professor Queerspeck stated that no substitute for the purposes to which these arcades were at present devoted had yet occurred to him, but that he hoped no fanciful objection on this head would be allowed to interfere with so great an undertaking.

'MR. JOBBA produced a forcing-machine on a novel plan, for bringing joint-stock railway shares prematurely to a premium. The instrument was in the form of an elegant gilt weather-glass, of most dazzling appearance, and was worked behind, by strings, after the manner of a pantomime trick, the strings being always pulled by the directors of the company to which the machine belonged. The quicksilver was so ingeniously placed, that when the acting directors held shares in their pockets, figures denoting very small expenses and very large returns appeared upon the glass; but the moment the directors parted with these pieces of paper, the estimate of needful expenditure suddenly increased itself to an immense extent, while the statements of certain profits became reduced in the same proportion. Mr. Jobba stated that the machine had been in constant requisition for some months past, and he had never once known it to fail.

'A Member expressed his opinion that it was extremely neat and pretty. He wished to know whether it was not liable to accidental derangement? Mr. Jobba said that the whole machine was undoubtedly liable to be blown up, but that was the only objection to it.

'PROFESSOR NOGO arrived from the anatomical section to exhibit a model of a safety fire-escape, which could be fixed at any time, in less than half an hour, and by means of which, the youngest or most infirm persons (successfully resisting the progress of the flames until it was quite ready) could be preserved if they merely balanced themselves for a few minutes on the sill of their bedroom window, and got into the escape without falling into the street. The Professor stated that the number of boys who had been rescued in the daytime by this machine from houses which were not on fire, was almost incredible. Not a conflagration had occurred in the whole of London for many months past to which the escape had not been carried on the very next day, and put in action before a concourse of persons.