The journal of design and manufactures
[Original papers:] Exhibition of 1851: Monthly report of progress., pp. 174-176 ff.
174 Original Papers: Exhibition of 1851 -Monthly Report. nately. The clock will be placed 48 feet below the centre of the dial, motion being communicated to the hands by means of brass tubes, 11 inches in dia- meter and about 40 feet in length. The whole will be moved by a series of powerful electro-magnets, on which are wound about 25,000 feet of copper wire. wo *maller dials, 5-feet in diameter, will be placed on the front of the gal- leriesat ea h end of the building inside, the whole of the dials to be governed by onependulum, which will be placed among the horological instruments in the space allotted for their exhibition. In this clock the impulse will be given to the pendulum by a remontoir escapement, in which an electro-magnet at each vibration of the pendulum bends a spring to a certain fixed extent, which spring in- unbending communicates the necessary power to continue the vibra- tions of the pendulum, independent of the variations of the electro-magnets. MACHINED PAPER-HANGINGS. IT is well known that it is at least some dozen years since the cotton and calico-printers of Manchester first began to print from cylinders, and it was not until within the last four or five years that the paper-stainers applied the same principle to printing papers, of a simple character, in one or two colours. At the outset their Success was very moderate, being unaccustomed to the use of body colours, abd unacquainted with their peculiarities and -the best methods of applying them. Consequently the papers produced were of a very inferior character and quality, and did not enter into competition with the block-printed papers. Lately some of the leading printers of the "golden flock papers," in London, have turned their attention to the use of the machine; and it is most satisfactory and surprising to witness the rapidity and precision with which papers of six or eight colours are run off, the whole eight colours being printed during the passage of the papers once through the machine. A single machine is capable of printing in one hour 200 pieces of paper, each 12 yards long, or 1500 pieces equal to 18,000 yards, or 54,000 feet per day. The paper upon which the patterns are printed is manufactured in lengths of 2880 feet each ; these are afterwards cut into 80 pieces, each 12 yards long. As an example of the skill with which this mechanical process is carried out at the present time, we give a specimen of a machined paper-hanging, manufactured by the firm of Messrs. John Woollams and Co., and all who have observed the progress of this manufacture will agree, that this specimen shews considerable improvement. ExHIBIION OP 1851: MONTHLY REPORT OF PROGRESS. LAST month we gave an outline of the general arrangements of the articles in the building, and the official notice now inserted in the JOURNAL will fill up any details wanting. We may repeat that all foreign articles will be placed east of the Transept, British articles to the west, the articles from our Colonies being nearest the Transept. We understand that the allotment of places in the building for each foreign country and each of the thirty Classes of British articles is completed. Arabia and Persia are at the north-west, and China at the south-west side of the Transept. The United States is at the extreme east, and will, therefore, be the first country the bulk of the visitors from the metropolis will reach-e NORTH. CENTRAL TRANBEPT. aBti sh cotinle, ______ dUaitetdte h - in 30 Classes. States. NORTH.
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