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44

Wrought-Iron Roofs for Buildings.

widely disseminating journal, that both these ingenious plans will become more generally known, and conscquently useful to the public.

The accompanying figures will serve to illustrate the two constructions. Plate II., fig. 8, is a diagram of the framing of the roof formed by Dr. Church; and fig. 9, is also a diagram, representing that erecting at the railway-works above-mentioned. In the first construction, shown at fig. 8, a, a, a, are the rafters; b, b, the horizontal tie-beam; c, c, the oblique tie-rods, each forming a triangle with the rafters and tie-beam, as a, a, d, a, a, d; and e, e, are the props supporting the middle of each rafter at the point d. This system of ties and props may be carried to any extent, as shown by dotted lines in the figure, for the purpose of giving additional support, if desired.

In the latter construction, adopted at the railway station, shown at fig. 9, a, a, a, are the rafters; b, b, the tie-beam; c, c, the tension rods, and d, d, the resisting props. I do not see the advantage of this variation from the original plan; it certainly forms an elegant and substantial framing for a roof, but does not, in my opinion, possess the same degree of strength, nor does it appear to be founded upon such correct scientific principles; I, therefore, greatly prefer the construction adopted by Dr. Church.

I am, Sir, yours, &c.

M. B.

NEW PATENT LAWS.

The second reading of Mr. Mackinnon's Bill in the House of Commons, for amending the laws relative to Patents, has been postponed sine die, and it is probable will not be proceeded with.

List of Patents

Granted by the French Government from the 1st of January, 1336.

PATENTS FOR FIFTEEN YEARS.

To John Spear, of St. John's Wood, England, represented in Paris by Mr. Perpigna, Advocate, of the French and Foreign Office for Patents, 2ter Rue Choiseul, for improvements in machines employed for spinning and doubling cotton, flax, and other fibrous substances.

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Samuel Faulkner, of England, represented in Paris by Mr. Perpigna, for improvements in cards used for carding cotton or other fibrous substances.

— John Buchanan, of Ramsbottom, represented in Paris by Mr. Perpigna, for improvements in machines for cylinder printing, which machines may be applied for printing paper, calico, and other fabrics.

-Theodore Schwartz, of Stockholm, represented in Paris by Mr. Perpigna, for a new application of known principles to produce a mechanical power.

William Keene, civil engineer, of Bordeaux, represented in Paris by Mr. Perpigna, for a new system of motive power applicable to navigation.

Michel Eisenmenger, professor of music, represented in Paris by Mr. Perpigna, for an improved piano, for registering the notes as rapidly as they are played.

- John George Bodmer, of Bolton-le-Moors, represented in Paris by Mr. Perpigna, for an improvement in the machines used for roving and spinning either cotton, wool or any other fibrous substance.

-Samuel Colt, of the United States of America, represented in Paris by Mr. Perpigna, for improvements in the construction of fire-arms.

Jean Baptiste Claviere, civil engineer, represented in Paris by

Mr. Perpigna, for improvements connected with locomotive carriages.

To Francois Peyre, of Marseille, represented in Paris by Mr. Perpigna, for a process for rendering sea water sweet.

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· Alphonse Ambert Valois, of Lyon, for a method of producing, reproducing, and reducing to various dimensions every kind of sunk or raised engraving.

Claude Perret, of Lyon, for improvements in the manufacturing of sulphuric acid.

- Decan and Co., of Belleville, near Paris, for improvements in mechanical lamps.

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Charles Clarkson, of London, for an hydro-pneumatic machine. Hyacinthe Pitay, of Paris, for an improved animal charcoal. Jean Stoddard, of Paris, for improvements in locomotive carriages.

Ipay Brothers, of Veaucourt, for a planing machine.

Miss Eliza Caroline Edward, of Rouen, for a new method of attracting the fishes either in the sea or in rivers.

-Francois Larroque, of Marmande, for an improved organ.

Joseph Eboli, of Paris, for an imitation wax candle.

-Louis Emile Tabarié, of St. André, for an improved system of baths.

-Joel Spiller, of London, for an improved steam generator.
-Jean Baptiste Le Pere, of Paris, for improvements in pianos.

Jeremiah Barret, of London, for a machine for cutting corks of all dimensions.

Eugene Fernier, of Paris, for a process for making all kinds of spirituous and acetous liquors sparkle and froth.

Pierre Jean Simon Sol, of Paris, for an improved machine for washing by steam.

-Frederic Sauvage, of Paris, for a machine for reducing and increasing the dimension of statues.

Pierre Francois Caron, of Paris, for a process of manufacturing plaited fabrics with permanent plaits.

Hoene Wronski, of Paris, for a new mechanical agent by means of gravitation.

To Ehrsam and Tmer, of Marseille, for improved machinery for preparing cocoons, drawing off, milling, carding and spinning the refuse and waste silk proceeding from the cocoons.

Aimé Grimaud, of Paris, for a new paddle wheel.

-Joseph Alexandre Boudin, of Avallon, for a new system of clock-work.

-Theophile Joseph Banse, of Lyon, for the process of manufacturing a new kind of crape with raw silk.

Onesiphore Pecqueur, of Paris, for a press for extracting the juice of the grated beet-root, in the process of manufacturing beet-root sugar.

- Victor Athanase Pierret, of Paris, for a machine for sawing wood into a thin continuous sheet for the purpose of veneering. -Joseph Skinner, of New York, for a machine for cutting wood into small pieces for various purposes.

-Besancenot, Duval, and Iozin, of Paris, for a process of trimming plate glass.

- Desgranges and Renaux, of Paris, for an improved kind of bridge.

Brevet Senior, of Pilhiviers, for boxes of a new description for the wheels of waggons.

- Edmond remy, of Paris, for an improved furnace for manufac turing animal charcoal.

-Michel Antoine Guicheux, for an improved kind of cabriolet.

PATENTS FOR TEN YEARS.

-William Newton, civil engineer, of London, represented in Paris by Mr. Perpigna, for improvements in pens, pen-holders, and pen-cutters.

- Patrick Mackie, of London, represented in Paris by Mr. Per pigna, for an improved washing machine.

Alexandre Fichet, locksmith, represented in Paris by Mr. Perpigna, for an improved safety lock, proof against any false keys.

John Brookes, of Manchester, represented in Paris by Mr. Perpigna, for improvements in the preparing of certain colours used for printing calicos and other fabrics.

To Auguste Ranglet, of Versailles, represented in Paris by Mr. Perpigna, for a new system of whitening the substances used for making paper.

Ferry, instrument maker, at Mirecourt, represented in Paris by Mr. Perpigna, for a new method of inlaying ornaments in tortoise-shell, horn, and whalebone.

Dominique Adrien Cabarrus, of Bordeaux, for a portable system of railroads.

-Henri Lecoq, of Paris, for a process of manufacturing coffee with Indian coin.

-Joseph Gauthier, of Beaumotte, for improvements in the process of fining iron.

-Jean Pouthon, of Nimes, for certain improvements on the Jacquart frame.

Moses Poole, of London, for improvements in tea and coffee pots and tea kettles.

-Athanas Michel, of Orleans, for an improved gun.

-John Burrows, of London, for a method of manufacturing stucco, mortar, and cements.

-Bizeard Féodiere, of Paris, for improvements in lamps.

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Thomas Wilson, of London, for an improved kind of soap.
Balm and Hussenet, of Paris, for a rotary pump.

ean Baptiste Gautherin, of Bordeaux, for reducing into syrup the water melon, and extracting alcohol from such juice. -Daublaine and Co. of Paris, for improvements on organs.

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Joseph Vallod, of Paris, for a method of preventing the livre flour from flying about the mill.

Chauveray and Joubert, of Paris, for a new motive power with a circular lever.

August Gilbert, for an improvement in stays for ladies. -Fillion, of Paris, for a machine for manufacturing gloves.

- Bernard Canonier and Duclos, of Paris, for a new hydraulic mo

tive power.

-Saint Valery Scheult, of Nantes, for a sugar boiling apparatus.

(To be continued.)

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