, in Geometry, is the drawing or delineating the fore-right plan or side of any object, and of expressing the heights or elevations of every part. Being so called from its determining things by perpendicular right lines falling on the geometrical plan; or rather, because all the horizontal lines are here straight and parallel, and not oblique as in representations of perspective.


, in Architecture, is the profile or elevation of a building, shewing all the parts in their true proportion. This is either external or internal.

External Orthography, is a delineation of the outer face or front of a building; shewing the principal wall with its apertures, roof, ornaments, and every thing visible to an eye placed before the building. And

Internal Orthography, called also a Section, is a delineation or draught of a building, such as it would appear if the external wall were removed.


, in Fortification, is the profile, or | representation of a work; or a draught so conducted, as that the length, breadth, height, and thickness of the several parts are expressed, such as they would appear, if it were perpendicularly cut from top to bottom.

previous entry · index · next entry


Entry taken from A Mathematical and Philosophical Dictionary, by Charles Hutton, 1796.

This text has been generated using commercial OCR software, and there are still many problems; it is slowly getting better over time. Please don't reuse the content (e.g. do not post to wikipedia) without asking liam at holoweb dot net first (mention the colour of your socks in the mail), because I am still working on fixing errors. Thanks!

previous entry · index · next entry

ORTELIUS (Abraham)