192 



THE CIVIL ENGINEER AND ARCHITECT'S JOURNAL. 



[JlNE, 



Railway Bridr/es. — Upon the extension line of the IMackwall R,iilway, from 

 stepney to Bow, are tivo bridRes, wliich are of a peculiar I'unn, and the first of their 

 class ererled for railway pnrposes. The roiiiiway upon them is Bnpported on wrought- 

 iron girders, placed transversely hetween two arches, or ril)3, formed entirely of wrought- 

 iron. The clear span of one is IliMfeet, of the other 11*5 ft. Hin. Each arch or rib of 

 the latter bridge, which carries the railway over the Regent's Capal, is formed of a box 

 built with iron boiler-plates U-lf'ths inili in thickness, and anple-iron lirmly rjvetted 

 together, its breadth being 'J ft. lu in., ts depth about '2 feet, and sectional area Si square 

 inchffS, and Is connected at the base by a wrou^^it-iron tie-bar, which receives the horU 

 zoBtal thrust of the iirch, and Is formed of links having a total sectional area of fi'J square 

 inches, bolted togt-thei with bolts L'i inches in diameter, aided by eight others at each 

 joint, j inch in diameter. Between the tie bars and the arch a system of vertical and 

 diagonal bracing has been introduced, so as in a manner to distribute the weightof passing 

 loads equally over the whole arch. These ribs so formed are laid in cast-iron plates, 

 fixed at one end, and free to move at the other over rollers, so as to allow scope for the 

 expansion and contraction of the metal. The clear interval between the bearings is 

 lU; ft. Hin. and the rise of the arch is 8 feet to the underside of the box of which it is 

 formed, the roadway being benearh the arch, and abont 'J feet above the bottom of the 

 tie-bar. The structure is exceedingly light; but appears, nevertheless, sufficiently 

 strong to carry the weights wtiich may come upon it in practice, as far as the areas of 

 the arch and bowstring, or tie, are concerned, and has stood the test of a dead weight of 

 '-'40 tons (in addition to iis own weight of ^)'J tons), distributed in weights of 3-Li tons at 

 equal distances over its lengtli, with a deflection of 3 ll-lCths inches, and recovered 

 entirely its original position upon the removal of the load. As this proof exceeds con- 

 siderably any weight that can be brought upon it in practice, I am cf opinion tliat it 

 may be used with safety for the passage of trains : but as it is of so novel and light a 

 construction, and the action of the cro^s-braciiig and connection of the tie-bars have not 

 been ascertained by continueJ experiments of moving wt-ights, I sliould recommend that 

 it be examined from time to time, so that any defect, if it should exist, might be ascer- 

 tained, more particularly as the weight of the whole bridg-^ including the double line of 

 roadway and covering, only amounts to IW tons, and is very easily set in vibratory 

 motion by any moving power.— Capt. Simmons's Report. — [A small engraving of this 

 bridge i.t given in the Journiil of October last (Vol. XI., p. 30i>). and an engraving by the 

 inventor. Mr. Harrison, in tlie Journal for January 1848 p. 1. — Kd. C.E. & A. Journal.] 



London and North Western Railway. — The new station at Euston-square 

 just opened, comprises a building 220 feet in length, by 170 feet in depth, designed by 

 Mr. P. C. Hardwicke. No expense has been spared to make it convenient, spacious, and 

 orna-nental. The cost is said to be about £150,CK)0. It contains all the necessary offices 

 for carrying on the business of this great estaldishment, including a large room, 75 lectin 

 length by 4.'> feet in width, for the purpose of holding the half-yearly and special meetings 

 of the proprietors. Several of the new offices aie already occupied, and when all the 

 offices are removed to the new building the old station will be taken down. According 

 to a report just presented to the directors by Captwin Huish and the resident engineers, 

 it appears that by reserving an annual sum of .^20,700, at 4i per cent., with compound 

 interest, the permanent way of the Londi-n and North- Western, 438 miles in length, 

 may be renewed as occasion may require. 



English Locomotives in France. — The Northern Railway Company, since 

 its extension to Calais, now run their extra trains and employ locomotives on Crampton's 

 principle, aud travellers may now go from London to the French capital, via Dover, in 

 13 hours ; from Paris to Brusst-Is in 10 hours ; and to Cologne in 21 J hours. The Paris 

 and Orleans and the northern lines were the lirst to employ English locomotives, and which 

 caused great jealousy on the part of the French engineers. Since the revolution the re. 

 public has been more liberal than the preceding Government, and at present English en- 

 gines are becoming mure general on all the lines. These engines are not shipped to any 

 of the French ports, but enter France by way of Belgium, ai d then to their local desti- 

 nation by means of the northern line. The revision of the French tariff", particularly as 

 regards British machinery, iron, and coal has been proceeded with, imd will come into 

 operation soon after the installation of the new National Assembly. The republic is 

 evidently desirous to carry out the free system gradually, as the means of increasing their 

 Gwn trade and commerce, and opening up a more lively intercourse with this country. 



Royal Arsenal^ Woolwich. — Considerable improvements have recently been 

 made in this important naval and military depot, especially In the foundry and carriage 

 departments. In the former a superior 30-horse power steam-engine has been put up, 

 and an entire new set of gearing for driving the diff"erent kinds of machinery in the dial 

 square for the manufacturing of guns. The engine has been fitted with Fairbairn's dou- 

 ble-beat equilibrium valves; the exhaust valve opens during the whole half-stroke, and 

 the steam valve can be sat to work at any degree of expansion, and by that means effect 

 a great saving in the consumption of fuel, 3 lb. of coal being found suificient for each 

 horse-power per hour. In the carriagt?^ department the large open spaces in the 

 square have been covered over with corrugated iron roofs, well li^jhted. At the eastern 

 end one of Nasmyth's hammers has been put up. of 20cwt., with a stroke of three feet 

 three inches, for the purpose of reforging the old pieces of iron and again making them 

 available for useful purposes. A neat engine of one-half horse power has been attached 

 for pumping water to the boilers, and two fuinaces for heating the metal. The saving 

 which will be effected by these additions will be considerable, and the quantity of work 

 which can now be executed by machinery brought to such perfection as to be far superior 

 for every kind of heavy work formerly performed by manual labour, places the autborities 

 in a position to meet any demand in cases of emergency. 



The Iron Steam- Frigate ^'Megara.^' — This frigate, built by Messrs. W. 



Falrbjirn nnd .Sons, for her Majesty's service, and launched from their yard, at Millwall, 

 on Tuesday, Way 22, is of the follmving dimensions :— Length between perpendiculars, 

 207 feet i breadth of beam 37 ft. 8 in.; depth of hold 24 ft. 3 in.; tonnage, 131)1 31 1)4. 

 She is constructed to carry— two guns on the gpiir-deck, 6(J pounders, S-) cwt. ; lour guns, 

 <I8-pounderB, (iO cwt. ; four guns, 32-pounders, 2.') cwt. ; lour tjuns on main-deck, 32- 

 poundi/rs, 3(! cwt. The keel and stern-post of the Megjera are of wrought-iron, H^ inches 

 wide, and of proportional thickness ; the frames consist of angle-iron, 6 inches by 3 inches. 

 |)laced 12 inches apart, in the way of the engine-room, and increasing in distance fore 

 and aft to 18 inches. The floors are 14 inches deep, by "-KUhs of nn inch thitk, and the 

 sheathing. plates vary from 1 l-lGths to 4 an inch in thickness, according to their position. 

 The engines of the Megiera have been constructed by Messrs. Rennie. She is to be pro- 

 pelled by a screw upwards of 13 teet in diameter, provision having been made for discon- 

 necting, and also fur 8bi])piug and unshipping the same, at pleasure. 



I-IST or KE^V PATENTS. 



GRANTED IN ENGLAND FROM ApRIL 10, TO MaY 24, 1819. 



Sijc Months allowed for Enrolment, wilcss otherwiss expressed. 



CharlesAlexandernroquette, of Rue Neiive St. Nicholas, St. Srartin, France, chemist, 

 for improvements in printing and dyeing fibrous and other materials— Sealed April 21. 



William Kilner, of Sheffield, York, engraver, for improvements in manufacturing rail- 

 way and other axles, and wheels and machinery to be emi)loyod in such manufticture— 

 April 24. 



Lewis Vernet, of Buenos Avres, for a method of preserving from cles'cniction by worms, 

 insects, decay, and tire, certain vegetable and animal subotances.— April 24. 



Thomas Harcourt Thompson, of Blackheath-hill, civil engineer, for certain improve- 

 ments in apparatus for prevent ing the rise of t iHuvinm from (bains. sewirR, cisspon a, 

 and other places ; and in apparatus and machinery for resuluting the levels of waters m 

 nvers, reservoirs, and canals.— April 2t;, 



George Simpson, of Nvwington-hutts, chemist, and Thomas Forster, of Streatham, 

 manufacturer, for improvements in manufacturing or treating solvents of india-rubber, 

 and of other gums or substances.— April 26. 



John Barsham, of Chelmsford, Essex, manufacturer, for improvements in separating 

 the fibre from cocoa-nut husks.- April 2ti. 



Charles lies, of Bordesley Works, Birmingham, machinist, for improvements in manu- 

 facturing picture-frames, inkstands, and other articles in dies or moulds; also in pro- 

 ducing oroaniental surfaces.— April 2fJ. 



William Fanlconbridge, of Long lane, Bermondsey, Surrey, for improvements in the 

 manufacture of hose.pipes, driving-bands, and valves for atmospheric railways,— April 

 2(i. 



Bartholomew Beniowski, of Bow-street, Covent-garden, major in the late Polish army, 

 for improvements in the apparatus for, and process of, printing.- April 26. 



Robert Oxland, and Jo^in Oxland, of Plymouth, chemists, for improvements in the 

 manufacture of sugar. — April 26. 



William Henry Burke, of Tottenham, manufacturer, for improvements in the manu- 

 facture of airproof and waterproL-f fabrics; and in the preparation of caoutchouc and 

 gutta-percha, either alone or in combination with other materials, the same being appli- 

 cable to articles of wearing apparel, bands, straps, and other similar useful purposes. — 

 April 2i). 



John Horsley, of Ryde, Isle of Wight, practical chemist, for certain improvements ia 

 preventing incrustation iu steam and other boilers ; also for purifying, filtering, and other- 

 wise rendering water fit for drinkable purposes. — April 2d. 



Alphonse Gamier, of Paris, France, but now of Scuth-street, Finsbtiry, merchant, for 

 certain improvements in extracting and preparing colouring matter from orchil. (A com- 

 munication.) — April 28. 



James Wilson, of Old Bond-street, tailor, for improvements in trusses. — May 1. 



James Godfrey Wilson, of Dlillman's-row, Chelsea, engineer, for certain improvements 

 in the manufacture of glass, and in machinery and apparatus connected therewith — 

 Meh' 1. 



Alexander Munkiltritch, of Slanchester. merchant, for an improved composition of 

 matter, which is iipplicable as a substitute for oil, for the lubrication of machinery, and 

 for other purposes. (A communication.) — fliay I. 



John Dalton, of HolHngworib, Chester, calico printer, for a certain improvement, or 

 certinn improvements, in printing calicoes and other surfaces; — May 1. 



Samson Waller, of Bradford, York, manufacturer, for certain improvements in ma- 

 chinery or apparatus for weaving. — May 3. 



Thomas Wentworth Buller, of Sussex-gardens, Hyde-park, esquire, for improvements 

 in thtt manufacture of earthenware. — May 3. 



Matthew Kennedy, of Manchester, cotton-spinner, for certain improvements in the 

 method of packing cops of cotton, and other fibrous materials, and in the apparatus con- 

 nected therewith. — Miiy ^5. 



Thomas Whaley, oi Cborley. Lancaster, coal proprietor, and Richard Ashtoii LightoU 

 ler, of the same place, cotton-spinner, f<ir certain improvements in machinery or appara- 

 tus for manufacturing bricks and tiles. — May 3. 



William Edward Newton, of Chancery -lane, civil engineer, for improvements in the 

 jacquard machine. (A communication.) — May 5, 



George Edmond Donisthorpe, and John Whitehead, of Leeds, manufacturers, for im- 

 provements in p'-eparing, combing, and hackling fibrous matters. — May y. 



Samuel Wilkes, of Wednesbeld-her.th, near Wolverhampton, br.iss-founder, for im- 

 provements in the manufacture of knobs, handles, and spindles for the same, for doors 

 and other purposes ; and improvements in locks. — May 8. 



Robert Sutcliffe, of Idle, ne;ir Bradford, York, cotton- spinner, for improvements in 

 machinery for spinning cottoc, silk, and other fibrous substances. — May 8. 



George Henry Dodge, of the United States of America, now residing at Manchester, 

 inanulactnrer, for certain improvements in machinery for spinning and doubling cotton 

 yarns and other fibrous materials; and in miicbinery or apparatus for winding, reeling, 

 balling, and spooling such subslpnees when spun. — May 10. 



Charlotte Smith, wife of Jabez Smith, of Bedford, for improvements in csrtain articles 

 of wearing apparel. — May 14. 



Samuel Allport, of Biimingham, gun-maker, for a certain improved method of making 

 or manufacturing a certain part or p^rts of looms used in weaving.— Blay 14. 



William Phillips Parker, of Lime-street, London, gentleman, for improvements iu the 

 construction of pianofortes, [k communication.) — May 15. 



John Thorn, cf Ardwick, near Manchester, calico printer, for improvements in cleans- 

 ing, scouring, or bleaching silk, woollen, cotton, and other woven tabrics and yarns, and 

 in agoing fabrics and yarns when jirinted. — May 15. 



Henry Bessemer, of Baxter-house, OM St, Pancras-road, engineer, and John Sharp 

 Cromartie Heyivood, of Islington, Middlesex, for improvements in expressing and Iruat- 

 ing oils, and in the manufacture of varnishes, pigments, and paints. — May lo. 



Moses Poole, of London, gentleman, for improvements in ap])arutu3 for drawing flni 's 

 from the human or animal body. (A conimmunication.)— May l."». 



Louis Alfred De Chatanvillard, of Rue St. Lazare, France, gentleman, for Improve- 

 ments in fire-arms, cartridges, bullefs, bayonets, and ordnance, (A commuFiication.)— 

 M:iy I.*). 



Pierre Armand Lecomte de Fontainemoreau, of South-Street, FInsbury, for certalu im- 

 provements in weaving. (A comnuinicatiou.) — May 22. 



Francis Edward I'olegrave, of Brighton, gentleman, for improvements in the means of 

 communicating between the passengers and guard of a railway train, or between the 

 guard and engine driver ; parts of which improvements are also applicable tu working 

 signals on railways. — May 22. 



Solomon Israel L>a Costa, of St. Helen's, city of London, civil engineer, for improve- 

 ments in vessels for holding solids or fluids, and in machinery for manufacturing such ves- 

 sels—May 22. 



Rees Reece, of St. John-street, Smitbfield, and Astley Paston Price, of Margate, Ktnt, 

 chemist, for Improvements in the manufacture and refining of sugar or saccharine mat. 

 ters.- May 24. 



Andrew Crosse, of Gloucester Place, New. road, Middlesex, esquire, for improvements 

 In tanning hides and skins, and also in dyeirig fabrics and substunces. — May 24. 



Thomas Goodfellow, of Tunstall, Stutl'ord, earthenware manufacturer, and Gcori-e 

 Goodfellow, of Shelton, Stiiftbrd, potter, for improvements in the method or methods of 

 preparing plastic mutei'lals for manufaciuring puri)Oses. — May 24. 



Andrew Smith, of St. James's, Westminster, engineer, for improvements in machinery 

 for, or methods of, manufacturing rope or cordage, and improved modes of fittmg and 

 using the same. — May 24. 



Frederick Steiner, of Hyndburn, near Accringlon, Lancaster, Turkey-red dyer, for im- 

 proved urocesses and apparatus to be used in the Turkey-red dye on cotton and its 

 fabrics— May 24. 



