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DOVE-COT, a small building or box in which domesticpigeons breed.

DOVE-TAIL, in joinery, a piece of wood formed like thetail of a dove.

DOVE-TAILING, the method of fastening one piece ofwood to another, by projecting pins, cut in the form of dove-tails in one piece, and let into hollows of the same form inthe other. Dove-tailing is either exposed or concealed ; con-cealed dove-tailing is of two kinds, lapped and mitred.

DOVE-TAIL MASONRY. See Masonry.

DOVE-TAIL MOULDING. A moulding used in Nor-man buildings, so called from the shape of the running orna-ment employed in its decoration, which consists of a fillet,tracing in its progress the form of a dove-tail, the alternatedove - tails being inverted, and having one side commonto both.

DOVE-TAIL NOTCH, a common dove-tail notch is thatwhere the bottom is in the form of a trapezoid.

An undercut dove-tail notch is that where the bottomis a parallelogram of greater breadth than the width of theparallelogram cut out of the surface ; the excess in breadthbeing alike on both sides.

DOVE-TAIL SAW, a saw used for dove-tailing. Itsplate is about 9 inches long, and has about 15 teeth in everyinch ; a rigid iron or brass back is added, to give stiffness tothe plate.

DOWEL, the pin - or tenon used in joining together twopieces of any substance. This pin or dowel is of wood oriron, and is thus used. Holes corresponding to each otherare made in the boards to be joined; one-half of the pin isinserted into the hole in the one piece, and the other piece isthen thrust home on it.

DOWELLING, or Doweling, the fastening together twoboards by the method above described.

DRAG, a term applied to anything bearing down, or rub-bing upon another : thus, a door is said to drag, when itshinges are so loosened, that the lower edge rubs upon thefloor : and the term is also applied in masonry to a thin plateof steel indented on the edge, used for finishing the dressing ofsoft stone which has no grit.

DRAGON-PIECE, a beam bisecting the wall-plate, forreceiving the heel or foot of the hip-rafters. It is most com-monly a very short piece of timber, fixed at right angles intoanother piece, called the angle-tie, or diagonal-tie, which isagain supported by each adjoining wall-plate being cockeddown thereon.

DRAGON-BEAMS, according to Neve, are said to be“ two strong braces or struts, that, stand under a bressummer,meeting in an angle under the shoulder of a king-piece.”—Neve’s Builder’s Dictionary . The writers of the presentwork have never heard the term applied to story-posts andbressummers, nor have they been able to learn any suchapplication of it; the word beam is improper for any piece oftimber, that stands slanting as a brace or strut. Neve’sBuilder’s Dictionary was an qriginal work ; and it is proba-ble that the author, who subscribes himself “ Philomath,”(a lover of learning) instead of architect, carpenter, joiner,mason, &c., might have been misinformed by the workmen,among whom he made his inquiries. 'I he Builder’s Dic-tionary , in two volumes, was copied from Neve, as was theDictionary of the first volume of the Builder’s Magazine;and we may farther add, most of the Cyclopedias and Ency-clopedias have applied the term in the same way as. Neve,and have used the same words in describing it. But withregard to the application of the term dragon-piece, as it isdefined above, we can refer the reader to the oldest booksthat are published ; see page 230, in the Rules for framing

roofs, at the end of Godfrey Richards’ Palladio, w ^ ai'dauthor says, “ 3. Dragon-beams for the hip to stan . ^er®'immediately following, he says, “4. Beam or summ el >in the dragon-beams are framed referring at the s< n tr)’>to Figure c, or Plate C ; see also our review of c j nge ifat the end of Godfrey Richards’ Palladio. Th e tl> #twhich Godfrey Richards uses the term, is thenow in use. It is true, that Moxon explains dug I'li®in the same way as Neve, but he refers to no j 16 ^’second edition of Godfrey Richards’ Palladio is c ‘ l r j,| )g fir 6 *and the first edition must be much more early-edition of Neve’s Builder’s Dictionary is dated pj gt e 11-have also the corroboration of Batty Langley , f ee a t tb eof the Addenda, consisting of fourteen plates ofend of his designs, where lie says, “ a e,b e, c e, “pieces to receive the feet of the hip-rafters 80 * ld . „ to eRichards and Batty Langley apply the same rnea nl f r e*

term.

We have been thus particular, because a P . veD ,

of 1

i

planation of the word, as it is used, has not b e(in .| p a ter®’to show that it is an injury to a work, to descii - ne d t0which has no existence, or, if it has, must be csome remote corner. a bt®

DRAIN, a subterraneous passage for water. dll be Pffjemg is obliged to be erected m a damp soil, it laf?j

to drain the ground before the foundation se rer g

buildings, there must be one principal drain, a fl( j ;smaller ones, depending on the extent of the tte robserve, that those with circular bottoms are pjtic

-vib fl0 eo‘V

cl1 ’ i t

....... ...vay ttie sediment much easier. to c ^ eat> Ai

ought to be of sufficient height to admit a P er ®° n are m u ,with ease. Circular, barrel, orstronger than common drains, in which the smby vertical walls. See Drainage and Sewkeage- ^, lt

to

so

is

doi®2’'>

a <01

. DRAINAGE. As we shall have occasion

important subject at some length, and as, in

desirable to consider the question both in its more

hensive and general sense, as well as in its details.

refer the reader to the article Sewerage . Undei ‘

we shall enter fully into the various methods of bo

age, as suggested by the improved knowledge oi

tunes, and describe the extensive works which c q l o^ c ' *

’* fee®

of

constructed for this purpose in the metropolis-

Sewer, Sewage.DRAUGHT, in

building on paper the repress

exterior and interior F ato D r of the various ge C'

turns, dratvn to ’> ^ means of phms, elevations, ie d

^e same ZLlf 6 ’ ^ » hich P*™ ®’' e ’-'tnS “be executed/Ail tl,Ti‘ aS - the pnrts of the e,!iii ®' e fhvP l0S>

fhe faces of t]. P ,, 5 , r,z °ntalparts are explainedand sections ■ n-ir/ 'T , ,wrts aie represented by e J - 0 ,j isParallel to tj.l £' !i ' W T> vvJ >en the plane of dchne e(rsions of building 8 t0 be re P res ented- The vertf* „re

understood from^ti Up °, n nr)d P°b'£ on ”J P c bP>P le%

buildings, besides ti‘ B elevtni °ns and sections. 1° eC tiof’a set of drawing if P’ ener *d plans, elevations, an p t)j«small parts. gS Should be made to show the det* 1

add, t , on to (he <j rfnvi wJn - c}i flre nse( j in cn ’f^oa !l j■ --- the exterio^gd

~ veft

ei>«0 ‘ lie

JL11 tlUUlUUfl IU U1C UIUHJUgS

the work, a perspective representation of th e

be furnished by the architect, in order' to t ),e etn - t jappearance and effect of the intended edl J i f e jn0 re P e . g tfl 0 *^

and perhaps, in some instances, two 01 ^ br>®^ l)t s c

representations will be necessary, in or< e gll ch P® s c®®'parts into view, which should be drawn „ eI ,er a ‘

those in which the building will he tn° ° y

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