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John & Robert Mallet of Ryder's Row, Dublin
1835 Advertisement: 'JOHN & ROBERT MALLET, PLUMBERS, Iron, Brass, and Bell Founders, Millwrights and Engineers, RYDER'S ROW, DUBLIN. MANUFACTURERS of Patent Lead Pipe, and Water Closets; Pumping Engines and Pumps; Plunging, Shower, and Hot Baths; Cocks; Copper Work; Mashing Keives; Malt Rollers; Garden and Fire Engines; Copper-Rivetted Leather Pipe, and Fire Buckets; LAND, MARINE, and LOCOMOTIVE ENGINES , STEAM BOILERS, Water Tanks ; Gasometers; Gas Apparatus ; WATER WHEELS; Weighing Machines; Hydraulic and Screw Presses; Lathes; Screw Jacks.; Purchase Blocks, CRANES, from forty tons downwards; Bark Mills; Fodder Steaming Apparatus; Mortar-Mills; HOT WATER APPARATUS; Rolled Iron Sashes and Conservatories &c. &c. &c.
'Beg to call Public attention to WITTY'S PATENT SMOKE-CONSUMING FURNACE, (of which they are proprietors for the central district of Ireland), as applicable to every closed furnace-by which a saving of fuel is effected of from 25 to 30 per cent.
'Pamphlets, explanatory of the nature of the apparatus, and numerous testimonials from the most respectable houses in England, Ireland, and Scotland, where it is in use, are to be had at their manufactory, where also the Furnace can be seen at work to the boiler of their own 16 horse engine.
'J. & R. M. take this opportunity of making better known to Millers, Brewers, Distillers and Manufacturers in general, throughout Ireland, that they are extensively engaged as Iron Founders, Millwrights, and Engineers; and that from the great power they possess in the magnitude and extent of their machinery, they can execute work with a rapidity, and in a style of perfection, fully equal to that of the best houses in England. -And with respect to price, are not only prepared to compete with Irish manufacturers, but have at this moment extensive works in hand, in competition with English Engineers, some of which are actually for exportation to England. The fact of their carrying on the Plumbing and Brass Foundry business in combination with their Iron Foundry and Engineering concern, gives them an important advantage in the fitting up of Brewery, Distillery and Hot Water Apparatus, &c. &c. &c. They beg further to notice, that they can execute the largest borings or turnings of any house in Ireland. Surfaces planed; and Screws cut to any required dimensions. Catalogues of their Wheel and other Patterns may be had at their Manufactory, or sent as required. RYDER'S ROW, DUBLIN, March, 1835'
The firm built a new foundry at Cross-Guns Bridge to the north of Dublin, c.1840, but during the 1850s business began to decline, and closed down c.1855. 
1854 Sale Notice: 'VICTORIA FOUNDRY, DUBLIN. MR. WHEATLY KIRK is honoured with instructions from Messrs. John and Robert Mallet, Ironfounders, Engineers, &c., of the Victoria Foundry, Dublin, to SELL BY AUCTION, on the above Premises, on THURSDAY, the 2d of NOVEMBER, 1854, and nine following days of business, commencing each Morning at half-past Ten o’Clock, the Whole of their Large and exceedingly Valuable PLANT, consisting of steam engines, boilers, tools, utensils, machinery, stock in trade, &a, viz. 16-horse high pressure beam engine, cylinder, 12in. stroke, 2ft. l0in.; 20-horse portable condensing beam engine, cylinder 18in. stroke 3ft. ; 30- horse cylinder and nozels; 16-horse condensing steam engine, cylinder 18 inches, stroke 3 feet, by those far-famed engineers George Forrester and Co., of Liverpool, 6 horse portable high-pressure beam engine, cylinder 8 inches, stroke 2 feet; 4-horse high-pressure horizontal engine, cylinder 6 inches. stroke 19 inches, with fly wheel and boiler complete; 2-horse high-pressure horizontal engine, cylinder 5 inches, stroke 15 inches, several second-hand steam engines and parts of engines, from 20-horse power downwards; high-pressure boiler, 8 feet long, 3 feet diameter ; ditto 15 feet 6 inches long, 3 feet 6 inches diameter; do. 13 feet 6 inches long, 4 feet diameter, with flue through ; all the powerful and valuable main, upright, and line shafting; counter ditto; bevil, mitre, and spur wheels, pulleys, bangers, pedestals, wall boxes, brass steps, &c.
The Mechanics' Shops containing blowing machine, with driving apparatus and fixings: large boring and turning double-geared lathe, on cast metal bed, 21ft. long, 3ft. 4in. on the face, will take in a wheel 13ft. diameter; double geared, boring lathe, 11½ in. centres, on bed 13ft. long, will take in a wheel 5ft.; 7½ in. raised to 9in.double geared screw cutting and slide lathe, bed 9ft. long ; two slide lathes, 11½ in. and 9in. centres, on beds 10ft. and 33ft. 9in. long respectively ; five double geared hand lathes, from 7½ in to 15in. centres; seven single speed band lathes, 7½ in. to 14½ in. centres; double geared vertical boring machine; large boring machine, will take in 6ft. 6in. wide; several single and double power drilling machines; planing machine, will plane 16ft. l0in. long, 4ft. wide, and 4ft. deep; ditto, will plane, 10ft. l0in. long, 2ft. wide, and 1ft. 8in. deep ; hand planing machine, will plane 3ft. 6in. long, 2ft. wide and 2ft. deep; 2 double geared screwing machines; 7 single power do., with taps, dies, &c.; 8ft. planing machine, large boring bar, blast cylinder ; nut-cutting machine. direct action German steam pump, 8in. stroke; cast metal circular benches and vices.
The tools are principally by Lewis, Whitworth, Nasmyth, Bodmere [Bodmer], Fairbairn, and other first-class makers, and includes valuable collection of taps and dies, files, drills, rose other bits, augers, and numerous other small tools; large quantity of smiths' and boiler-makers' tools, anvils, bellows, slake troughs, &c.; 3 lever punching and shearing machines; one large do. do.; cast-iron boilers various.
In the Foundry and Yard—Ponderous double purchase yard crane, and fittings; 3 large foundry double purchase cranes, with traverse motions; blocks, chains, &c.; all the excellent moulding boxes; strong four-wheeled lurry; 3 core carriages; 3 large cast metal cupolas, will melt from 2 to 11 tons; single and double purchase crabs; 3 weighing machines up to from 5 to 8 tons; platform weighing machine; scales, beams, and weights; force pumps; fire-engines, &c.
In the Stores: Chains, blocks, ropes, oils, paints; copper, iron, and steel wire; bolts and nuts; stocks, taps, and dies; wood and iron screws; washers; glass and emery paper ; nails, brass taps, and a variety of other new brass work; copper and brass piping ; bar, rod, hoop, angle, and other iron; and steel of various kinds.
The Stock of Timber includes green heart oak, teak, birch, deal, &c building materials, windows, stone bricks. &c.
The truly Valuable Models and Patterns in lead, brass, iron, and wood, are in the best possible condition, and modern in design. All the Gas Fittings, Piping, Burners, &c., throughout the premises ; together with a vast assemblage of other valuable plant, tools, utensils, stock in trade, and effects. Catalogues may had at the Works, in Dublin ; at the Offices of the Auctioneer, Cross-street Chambers, Cross-street, Manchester; or 4, Kirkgate, Leeds; or by post, on receipt of twelve stamps. N B. Sale to begin each day at half-past ten o'clock.'