EXTERIOR FINISHING OF COTTAGES. ^65 colouring matter, powdered, and intimately mixed with raw linseed oil. Paint of this kind is prepared in London, and sold in a state of powder, under the name of anti- corrosion, litliic paint, i*tc. : but, as it requires to be mixed a day or more before it is used, as it is nuicli more laborious to put on than common paint, as it wears out the brushes in a very short time, and, above all, as it lasts so long when applied to iron, or well-seasoned timber, or masonry, as seldom to require renewal during a man's lifetime, painters very seldom recommend it. Tlie appeai-ance of a surface painted with anti- corrosion is rougli, resembling that of unrubbed cast iron or freestone ; and, when timber which has been once painted with it has to be cut up by a cai-penter, it takes the edge off his tools (even his axe and saw), so that he also is against it. It is used, how- ever, in some government works ; particularly for cast-iron bridges. 547. The Jfalls of Cottages may be protected and ornamented by Matheinatical Tiling. The object of this is to make the walls appear as if they were built of brick. The tiles, fig. 461, have their surfaces in two planes ; each plane of the depth and length of a common brick ; so that when tiles of this kind are placed against a wall, the one overlaps the other, as shown in the section, fig. 462 ; and the general appearance of the elevation is that of regular brickwork, as in fig. 463. There are bats or headers to imitate half bricks, fig. 464 ; and closers or quarter bricks, fig. 465, for the purpose of breaking 462 463 4€1 1 i; 11 11 1: i 1: ' i 1 ii 1 1 11 1 I 1 !i 1 1 joint at the angles, and rendering the imitation more complete. When these tiles are of cream colour, their effect is very neat, clean, and handsome ; but buildings in Avhich thav are used, to be in good architectural expression, ought always to have vertical bond in the form of projecting piers or angle stones. 548. Mathematical and common weather tiles may be rendered ornamental, either by varying their outline, or by impressing on them, in the mould, lines or figures. This has been done in a few places in England with bricks, and we think also with tiles. Fig. 466 shows some forms of weather-tiling, in addition to those before given, § 459. 466 ^"^ ^ K ^^ %il By taking leaves of plants as the source for originating ideas for varying the outline, the variety of ornamental weather-tiling might be carried to a g^eat extent ; and we are informed by travellers that it would be a most valuable protection to the wooden walls of houses in America, as we are certain it would be to the earthen walls of the farm buildings which are put up in some parts of Ireland. Weather tiles might also be applied instead of barge boards, the tiles in that case being formed longer ; and, when put on at right angles to the slope of the gable, finished by a projecting line of plain tDes over them. The colour of common weather-tiling might be varied, as well as the form, by the mixture of chalk, ochres, &c., with the clay while working it. IMathe- matical tiling might be ornamented on the surface by geometrical lines and figures j by
