the angle of 60°, or that formed by an equilateral triangle, is the angle shewn in the drawings, yet the patentee does not confine himself thereto, as any other angle might be employed; the object of this block being, not only merely to support its own particular line of blocks, but also all those blocks with which it is in connection, in order to combine the whole into one compact and self-supporting

mass.

The next part of the invention consists, in combining or connecting blocks together, by means of tongues or fillets, placed in an upright position, or nearly so. Figs. 9, and 10, represent plan and side views of part of a pavement, laid down upon this principle. The peculiar shape of block shewn in these figures, is not claimed as new ;-it is formed by cutting up a length of wood, at any convenient angle, and placing two single blocks, side by side, but with their angles subtending in opposite directions. Fig. 11, represents one of the blocks detached, with the tongue or fillet connected thereto. In order to connect the blocks together, upright grooves f,f, are made in both sides of all the blocks; so that, when they are placed side by side, a square hole is formed, by two grooves coming in conjunction; and into this hole a tongue or fillet e, is driven.

One advantage attending the use of this part of the invention, is the facility with which any number of blocks may be removed and replaced, without at all injuring the solidity of the pavement. To effect this, it will only be necessary to withdraw the dowels or tongues, on each side of the blocks, and the pavement may be removed with ease, The manner in which these blocks are connected together, may also be employed with the blocks, shewn in figs. 1, and 2, instead of the connecting cramps or irons therein shewn.

The patentee claims, Firstly,-the manner of forming or constructing and combining blocks, as shewn in figs. 1, 2, and 3. Secondly, the peculiar form of block, shewn in figs. 4, 5, 6, 7, and 8. Thirdly,-connecting or combining together blocks, of any suitable form, by means of a pin or pins, or dowels, fillets, or tongues, placed in an

upright position, or nearly so, as shewn in figs. 9, 10, and 11; which pins, dowels, fillets, or tongues, may be withdrawn, in order to remove any part of the pavement, as above described.—[Inrolled in the Rolls Chapel Office, February, 1843.]

Specification drawn by Messrs. Newton and Son.

TO MOSES POOLE, of Lincoln's-inn, in the county of Middlesex, Gent., for improvements in paving or covering roads and other ways,-being a communication.-[Sealed 11th August, 1842.]

THE first part of this invention consists, in the peculiar forms of blocks, represented in Plate IX., at figs. 1, 2, 3, and 4; they are described by the patentee, in the following words:"The solid, or form of block, fig. 1, is a quadrangular prism, inclined two ways, the base of which is a right angle. a, b, c, d, or a1, b', c1, d', rising, parallel to itself, in the diagonal direction d, b, for a row of blocks, and in an opposite diagonal direction c1, a', for the following row, and so on, alternately changing the row. The solid or block, shewn at fig. 2, is a quadrangular prism, inclined in two ways, the base of which is a rhomboid e, f, g, h, or e1, f1‚ ̈ g', h1, rising, parallel to itself and obliquely, in a diagonal direction g, e, for a row, and in the opposite direction h1, f', for the following row, and thus alternately changing the rows." The block, represented in side and end view, at figs. 3, and 4, " is a quadrangular prism, the base of which is a right angle, rising perpendicularly and parallel to itself." The second part of the invention consists, in forming the blocks into pavements, by the aid of tongues or tenons, beams, rods, and pins. Fig. 5, is a side view, and fig. 6, a plan of part of a pavement, composed of blocks, similar to that represented in front and side views at figs. 3, and 4. The blocks (which are preferred to be of oak instead of pine) rest upon the beams i, and are connected together by the tongues or tenons j, inserted in the mortices k, in

the sides of the blocks. Before laying down the blocks, the ground is properly prepared by levelling; and if a very solid foundation is required, a quantity of oak laths are laid down, (the spaces between them not exceeding the base of each block,) and covered with a layer of gravel or earth, which is well rammed or beaten; and upon it the blocks are placed. Fig. 7, is a side view, and fig. 8, an end view of two courses of blocks, which are supported and retained in their places by the beams l, m, n. Fig. 9, is a side view, and fig. 10, an end view of another mode of supporting blocks, and retaining them in their places, by the employment of the beams o, and pins p. Fig. 11, is a plan of four courses of blocks, which are connected together, and support each other, by means of the rods q, and r. Other figures are shewn in the drawings attached to the specification, in which the blocks are connected and supported by one series of rods q, or r, only.

The pavements, shewn in figs. 7, 8, 9, and 10, are furnished with key-blocks, in order that they may be readily removed. One of these keys is seen at s, fig. 9; and it appears, from the description given by the patentee, that the key-block is not retained in its position by the pin p, but by the projection t, of its key; on turning which, the block is released, and can be withdrawn from its place in the pavement. Instead of using key-blocks, long pieces of wood or stone may be placed at the sides of the street or road, in contact with the sides or ends of the outer blocks; and when these side-pieces are taken up, the blocks can be removed.

To prevent horses and other animals from slipping, the patentee uses blocks of different descriptions of wood, such as pine and oak, laying down a row of each, alternately; or else forming each row, partly of one sort, and partly of another; he also grooves the upper surfaces of the blocks, in the manner shewn in figs. 6, and 11.- [Inrolled in the Inrolment Office, February, 1843.]

To RAOUL ARMAND JOSEPH JEAN COMTE DE LA CHATRE, Chevalier de la Légion d'Honneur, of Leicester-square, in the county of Middlesex; RICHARD TAPPIN CLARIDGE, of Weymouth-street, in the county of Middlesex, Gent., and RICHARD HODGSON, of Salisbury-street, Strand, in the county of Middlesex, Gent., for improvements in preparing of fabrics, to be used in covering floors, roofs, and other surfaces,-being a communication.—[Sealed 26th April, 1842.]

THESE improvements, in preparing fabrics for covering floors, roofs, and other surfaces, consist in coating the fabrics, on one or both sides, with a composition called "oropholithe," which is produced by mixing together eight parts, by weight, of linseed oil, four parts of litharge or white-lead, nine parts of whiting, and thirty-six parts of sand. The oil and white-lead, or litharge, are first mixed together, then the whiting is introduced, and lastly, the sand is added to the mixture. But it is not absolutely necessary that this mode of proceeding, and the above proportions, should be strictly adhered to. If the composition is required to be of a light color, boiled linseed oil, and pale litharge, or ground white-lead, are used; but when a light color is not requisite, red litharge is employed. The whiting and sand are rendered perfectly dry, and passed through a fine sieve, before being added to the mixture; the sand is preferred to be of the kind called white or silver sand; but yellow sand, or finely-powdered bricks or tiles, may be used.

The fabric which the patentees prefer, for covering roofs, &c., is canvass, of an open texture, and it is prepared in the following manner:-The canvass is stretched upon a table or slab, of Roman cement or slate, supported by legs, and enclosed in a wooden frame; and a coat of the composition, one-sixteenth of an inch thick, is applied to one or both sides of it. The fabric is covered with the composition on one side only, when it is intended to be used in dry situations; but if it be required for covering roofs,

and other surfaces exposed to wet and damp, both sides are coated. The composition is polished with pumice-stone, fine sand, oil, or brown free-stone; and it may be brought to any required tint, by the addition of a small quantity of coloring matter; it may likewise be ornamented with colored patterns or designs.

The patentees conclude as follows:-" Now, whereas we do not claim the table, or any of the instruments, hereinbefore described or mentioned, to be used in applying the said composition, called oropholithe, but we do claim, as our invention, the following improvements; that is to say,the making the said composition, hereinbefore called oropholithe, in whichever of the modes, herein before mentioned, and with whichever of the substances, herein before mentioned, as being capable of being used in the composition thereof, the same may be composed; and whether combined, or not combined, with coloring matter; and the covering of one or both of the surfaces of fabrics, to be used in covering roofs, and floors, and other surfaces with the said composition.-[Inrolled in the Inrolment Office, October, 1842.]

To BENJAMIN Cook, Jun., of Birmingham, in the county of Warwick, brass founder, for improvements in the constructions of bedsteads, both in metal and wood.-[Sealed 23rd May, 1842.]

THESE improvements in the construction of bedsteads, both in metal and wood, consist in coating or casing the shafts or pillars, and other parts of the framing of bedsteads, with paper, pasteboard, papier-maché, or other similar composition; or attaching to such framing, figures or devices of a similar material, and afterwards ornamenting the external surfaces of the same, by painting, japaning, gilding, silvering, varnishing, and otherwise decorating them. In carrying this invention into effect, the patentee takes the metallic or wooden shafts, rods, or frames, (which have previously been