File:An encyclopaedia of architecture, historical, theoretical, and practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth (1888) (14784115482).jpg

Identifier: 2encyclopaediaof00gwiluoft (find matches)
Title: An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth
Year: 1888 (1880s)
Authors: Gwilt, Joseph, 1784-1863 Papworth, Wyatt Angelicus Van Sandau, 1822-1894
Subjects: Architecture Architects
Publisher: London Longmans, Green
Contributing Library: Architecture Landscape Design - University of Toronto
Digitizing Sponsor: MSN

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
ew of the interior to be delineated, to place the station point of thespectator out of the room or place, supposing one or more of its sides to be removed. Thisis, in fact, a delusion, as is every view of an interior possessing any merit that has comeunder our notice. But for picturesque delineation, it is not only one which is necessary,but one without the practice whereof no satisfactory representation can be given of an in-terior whose dimensions are not very extended. Tlie section whereon we are now engagedis not supposed to be a treatise on Perspective, but merely a concise developement of itsprinciples so as to give the reader such a general knowledge of the subject as may enable ;-?2 THEORY OF ARCIiiTECTLUE. Book II.. liim to pursue it, if he please, from the hints it affords. With this apology for not prf>.ducing to him a more complicated, though not less useful subject, we proceed. 24,30. Fig. 836. (No. 1.) represents the plan of a staircase one third the size used for the
Text Appearing After Image:
purposes of the delineation ; YZ (No. l.)is the plane of the picture, O is its centre. Iloiiithe data, therefore, there will be no difficulty of obtaining the vanisliiiig points of tlie sidesYn and ah. The diagram is not encumbered with the visual rays necessary for the deline-ation, which we are to suppose drawn and transferred to their proper places on No. .>.,wherein HH is the horizontal line. No. 2. is a longitudinal section of the staircase, whereinare shown tiie rising and descending steps, and the dotted line cd gives the section of thevaulted ceiling over the staircase. It will be immediately seen that the ends of the stepswill be determined by visual lines, notwithstanding the ascent and descent of them, becauseeither is determined by referring to any lines of height, which may be obtained from theplan and section, by which the portions seen of tlie liii^hts will be immediately foinid and Chap. IV. PERSPECTIVE. 823 transferred to tlieir respective jilaces on tlie picture.

Note About Images