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An Ellustrated Glossary of Technical
Terms used in Architectural and
Interior Decoration.

(Continued from page 146.)

CARPENTRY, the art of employing timber in the construction of edifices, divided into two grand branches, carpentry and joinery, the first including the larger and rougher descriptions of work, the second all the interior finishing and ornamental wood-work.

CASING OF TIMBER-WORK, the plastering of a wooden house all over on the outside with

CINCTURE, a ring or list at the top or bottom

A

mortar, and making it resemble stone-work, of a column; marked a in the engraving.

by striking it while wet with the corner of a trowel or like instrument, guided by a rule,

CINQUEFOIL, an ornament used in gothic

which gives the exterior of the house the architecture.
appearance of a stone building. This is best
performed on heart-laths, because the mortar
is apt to decay the sap-laths in a short time.
It is commonly laid on in two thicknesses, the
second before the first is dry.

CAUSTICUM, a composition for the removal of paint from old carved wood, stone, iron, &c. It is prepared as follows:-Six ounces of soft soap, six ounces of American potash, and three ounces of spirit of ammonia, mixed with quicklime and water to the consistency of thin paste, strained, and bottled for use.

CHANDELIER, an immense branched candlestick, suspended by a rope or chain from the ceiling. It is sometimes gorgeously decorated

CIRCLE, see "First Steps to Geometry," page 14, ante.

COMPASS or COMPASSES, a mathematical instrument employed by artists and mechanics

with cut-glass ornaments, which, by reflecting the light one upon the other, produce a succession of varied tints almost dazzling the eyes of the beholder.

No. 20.-VOL. I.

A

B

to draw circles, and to measure or define distances between two points. A is the socket or universal compass, which, in itself, constitutes nearly a case of instruments; the upper portion of the leg, being hollow, forms a socket for the pen and pencil points, which are secured by means of a spring. When the pen or pencil is required for use, it is only necessary to draw it out and to reverse it in the same socket. B is a larger compass of the same description, having a moveable point, in order to admit of the pen or pencil being attached to it. c is a triangular or three-legged compass, similar to the common one, only that it has an additional leg fitting to the head by a joint or socket, so that it may be moved in almost every direction. These compasses are serviceable in making trigonometrical and geographical drawings, as well as for the copier and engraver; but they are seldom

C

D

employed. D is a proportional compass, consisting of two flat pieces of brass, pointed at each end with steel, and laid one upon the other, so as to appear when shut but one piece. These pieces slide one over another, moving round a sliding centre, along a groove or channel, cut through nearly the whole length of the compass leg. To the centre is fixed a brass slide, with a fine hair line, serving as an index, drawn thereon, to be placed against the divisions marked on each side of the groove of the compass. The divided lines are four in number-namely, a line of lines, a line of superficies or areas, a line of solids, and a line of circles, or polygons inscribed in circles.*

(To be continued.)

We will shortly describe the above lines, as also the manner of setting the compass.-EDITOR DECORATOR'S ASSISTANT.

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50. Japanners' Copal Varnish.

Take of pale African copal seven pounds, fuse, add half a gallon of clarified linseed oil; boil for a quarter of an hour, remove it into the open air, and add three gallons of boiling oil of turpentine, mix well, then strain into the cistern and cover it up immediately.

51. Varnish for the Internal Parts of Carriages, &c.

Take of sandarach nineteen ounces, pale shellac nine ounces and a half, very pale transparent resin twelve ounces and a half, turpentine eighteen ounces, alcohol five (at 50-0) five pints, dissolve.

52. Carriage Varnish.

The following is used for the wheels, springs, and carrriage parts of coaches, and other vehicles, and by house-painters, decorators. &c., who require a strong, quick-drying, and durable varnish.]-Take of pale African copal eight pounds, fuse, and add two gallons and a half of clarified linseed oil; boil until very stringy, then add dried copperas and litharge of each a quarter of a pound; boil and thin with five gallons and a half of oil of turpentine; then mix while hot, with the following varnish, and immediately strain the mixture into a covered vessel:-Gum amina eight pounds, clarified linseed oil two gallons and a half; dried sugar of lead and litharge of each a quarter of a pound, boil and thin with five gallons and a half of oil of turpentine, and mix it while hot as above directed."

53. Second Quality.

Take of sorted gum amima eight pounds, clarified oil three gallons, litharge five ounces. dried and powdered sugar of lead and white copperas of each four ounces; boil and thin with five gallons and a half of oil of turpentine.

54. Varnish for Coloured Drawings. Take of Canada balsam one ounce, oil of turpentine two ounces; dissolve. Size the drawings first with a jelly of isinglass, and when dry apply the varnish, which will make them look like oil-paintings.

(To be continued.)

Painted Decorations.

monly introduced, and are matters of frequent and particular account.

During the long reign of Henry III., occupying the whole of the first half of the thirteenth century, directions as to such are numerous and special, in connection with the various works ordered by this king to be performed at his several palaces and residences at Westminster, Northampton, Guildford, Winchester, and elsewhere.

66

CHROMIC Or Coloured embellishments in architecture have their origin in remote antiquity. The Egyptians painted their temples and habitations, as did several other of the primitive eastern, nations; and the practice descending, became common alike to the classical and mediæval ages. In that of England, properly In 1220, the fourth year of this reign, the so distinguished, such or similar decorations king's painted chamber, "cameram nostram occur very early. Among the Anglo-Saxons, depictam," in the castle of Winchester, is "pictures of saints," with "embroidered referred to. In 1232, the sixteenth, the figures clothes," used as hangings,-"pictas vestes," of the four Evangelists, with those of St. -as they were called, and painted sculptures, Edward and St. Edmund the king, are ordered ornamented the walls and altars of churches to be painted in the chapel of the palace, at so early as the latter part of the seventh Woodstock. Again, in 1233, the following century, following a custom coevally and long year, a mandatum, addressed to the sheriff of antecedently exhibited throughout the adjacent Southampton, directs the king's wainscoted continent. At the commencement of the chamber cameram regis lambruscatam," in ninth, sanctioned by authority and example the castle of Winchester, to be repainted with derived from this source, we find the introduc- such "histories and pictures as were previously tion of such pictures or paintings the subject depicted there;" and there are other further of express ecclesiastical injunction. By a notices almost yearly throughout this reign. canon of the second council of Calcuth, or Celicyth, in Northumberland, held A.D. 816, every bishop dedicating a church, is strictly required to see painted on the walls or altars thereof the figure or picture of its patron saint. As a relative illustration, it may be noted also that in a Saxon MS. of this age, quoted in Muratori Antiq., are contained (among others relating to similar arts) directions for staining glass, so as to form " pictures of mosaic work," with which it would seem many of the altars and shrines of this period, in imitation of the foreign glass and other mosaics similarly applied, were constructively and otherwise ornamented.

In the following reigns of Edward I., Edward II., and Edward III., similar applications continue to be recorded in the descriptions of the decorations by these kings, to the palace, the chapel of St. Stephen, and the abbey church at Westminster, as well as in those referring to others performed by several of the higher ecclesiastics of this period to their palatial residences and churches. Early in the reign of Edward II., Bishop Walter Langton caused the coronation, marriages, wars, and funeral of his patron, the late king (Edward I.), to be painted on the walls of his episcopal hall at Lichfield, then newly built. About the same time also, Adam de Sodbury (Abbot) adorned the nave roof of Glastonbury with "beautiful paintings;" and in 1335, 1336, and 1339, "nova pictura" are mentioned among the works at Ely.

Of the extent of these and the like applications of painting and mosaic during this and the next succeeding century, little or nol irect and authoritative record now exists, though indications of the adoption of such are to be Henceforward it is hardly necessary to follow traced in the descriptions of the altar tabulæ, the order of further reference, or to recur to and other similar gifts, made to the early the numerous additional evidences that might Saxon church. Approaching the Norman be adduced of the continued and increasing era, however, an extended use of "picture admission of painting and colour during this work," under which term both these forms of and the fifteenth and sixteenth centuries. decoration were at this time included, is deci- Many examples yet remain, and sufficiently dedly and distinctly established. "Superb exhibit both the universality of the practice. picture work," intermixed with gold, is des- throughout those periods, and its great beauty, cribed as among the works performed by the discriminately applied, as an accessory enrichSaxon Archbishop Aldred to his cathedral of ment in our ancient architecture.-From Mr. York in 1061, and the pictured ornaments of Blackburne's new book, on Decorative Painting, the church of St. John, at Beverley, of a cor- applied to English Architecture, during the responding age, are also alluded to by the same | Middle Ages. authority. At a little later date, the second, or Lanfranc's cathedral at Canterbury, had its ceiling egregiè depictum." Subsequently, Malmesbury also notices its "pictured roof, and in continuation, the choir paintings at Ely, by Bishop Ridel, and the ceiling at Peterborough, may be adduced, which latter, erected according to general authority between the years 1177 and 1199, has descended (restored) to the present day.

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From the period to which the above notices have reference, pictured or painted decorations of several kinds appear to have been com

SUSPENSION BRIDGE ACROSS THE DANUBE.The Pesth suspension-bridge across the Danube is now nearly completed. The fol lowing are its dimensions:-Length, in three spans, 1,200 feet; centre span, 600 feet; side spans, each, 300 feet. The chains are preparing in England; the granite was brought from Linz, in Upper Austria. Nearly all the principal workmen were Englishmen. bridge was designed by Mr. Tierney Clark, and its cost will amount to £600,000.

The

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Draw the diagonal A c, upon which let fall from its opposite angles B and D, the perpendiculars B F and D E. Find by measurement the diagonal A c, and the perpendiculars B F and DE; then,

1. Multiply the diagonal by the sum of the two perpendiculars, and half the product will be the answer. Or,

2. Divide the trapezium into two triangles, and the sum of the areas of these triangles will give the area required.

Example.-How many square feet are there in a trapezium whose diagonal is 64, and the two perpendiculars 28 and 32 feet?

28 32

64

2) 3840

1920 ft. area.

E

B

Multiply the sum of the parallel sides A B and D c by the perpendicular distance between them, E c, and half the product will be the

area.

Example.-Required the area of a trapezoid of which the parallel sides are 120 feet and 90 feet, and the perpendicular distance 40 feet?

120 90

210

40

2) 8400

4200 sq. ft., area required.

PROBLEM VII.

To find the area of any irregular figure.

Draw diagonals, dividing the figure into trapeziums and triangles; then, having found the area of each by Problems II. and V., add them together, and the sum will be the area required.

Example.-What will be the area of the figure A B C D E F G A, having AC 42 ft., BI 44

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