A Practical Treatise of Perspective, on the Principles of Dr. Brook TaylorLeigh & S. Sotheby, 1806 - 313 páginas |
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Página vii
... alfo contains the rudiments of practice for lines , parallel and perpendicular , to the picture . The second section contains inftructions , with examples for draw- ing objects , the fronts and fides of which are parallel and perpendi ...
... alfo contains the rudiments of practice for lines , parallel and perpendicular , to the picture . The second section contains inftructions , with examples for draw- ing objects , the fronts and fides of which are parallel and perpendi ...
Página viii
... alfo fome theoretic inftructions , together with obfervations by way of praxis ; all of which will be found ex- tremely useful to the ftudent . In the technical language of the fcience , the terms adopted by Dr. Brook Taylor are united ...
... alfo fome theoretic inftructions , together with obfervations by way of praxis ; all of which will be found ex- tremely useful to the ftudent . In the technical language of the fcience , the terms adopted by Dr. Brook Taylor are united ...
Página 2
... alfo equal . If a triangle has three unequal angles , its fides are alfo unequal ; of any two fides , that one being the greater , which is opposite to the greater angle . 9 Examples Examples of Angles . The angle A B D , 20 GEOMETRY .
... alfo equal . If a triangle has three unequal angles , its fides are alfo unequal ; of any two fides , that one being the greater , which is opposite to the greater angle . 9 Examples Examples of Angles . The angle A B D , 20 GEOMETRY .
Página 3
... alfo the angles PLATE of Fig . 11 . Fig . 8 , is an acute angle , and the angles of the triangles , Fig . 7 and 12 , are all acute . Fig . 13 , is an obtufe angle . Having defcribed the properties of right lines and angles , it will be ...
... alfo the angles PLATE of Fig . 11 . Fig . 8 , is an acute angle , and the angles of the triangles , Fig . 7 and 12 , are all acute . Fig . 13 , is an obtufe angle . Having defcribed the properties of right lines and angles , it will be ...
Página 5
... alfo the faces or fides X 1 , X 2 , of the building R 2 ; and those planes are at right angles , or perpendicular to each other . PROBLEM S. PRO . I. Fig . 1. To bifect a right line . See Euclid , Problem 10 , Book I. - Upon either of ...
... alfo the faces or fides X 1 , X 2 , of the building R 2 ; and those planes are at right angles , or perpendicular to each other . PROBLEM S. PRO . I. Fig . 1. To bifect a right line . See Euclid , Problem 10 , Book I. - Upon either of ...
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abacus alfo alſo arch artiſt bafe line baſe line becauſe block Brook Taylor building cafe compaffes confequently confidered conftruction cornice defcribe demonftrate determine diagonal difpofed dimenfions draw a line draw a right draw right lines draw the line equal example exprefs fame procefs fcale fcience feat fecond feen feet fhadow fhould fides figure firft firſt fituation foffits follows fome foregoing fpectator fquare front fuch fufficient fuppofed geometrical given ground line height horizontal line inches inclined inftructions interfect the line line a b line drawn line G lines parallel lines perpendicular marked meaſure mitre lines moſt mouldings muft muſt neareſt angle neceffary obferved objects parallelogram pedeſtal pediment Perſpective picture piers plane Plate plinth point of diſtance produce purpoſe reprefentation reprefented ſcale SECT Section ſpace ſquare ſtanding ſtep ſtudent theſe thickneſs thofe lines thofe points upper uſeful vanishing line vanishing point vertical line whofe width
Pasajes populares
Página 3 - A circle is a plane figure contained by one line, which is called the circumference, and is such, that all straight lines drawn from a certain point within the figure to the circumference are equal to one another : 16.
Página 3 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference. XVIII. A semicircle is the figure contained by a diameter and the part of the circumference cut off by the diameter. XIX. "A segment of a circle is the figure contained by a straight line, and the circumference it cuts off.
Página 3 - ... OF THE CIRCLE. A circle contains a greater area than any other plane figure bounded by the same length of circumference or outline. A circle is a plane figure contained by one line and is such that all straight lines drawn from a point within the figure to the circumference are equal, and this point is called the center of the circle. A diameter of a circle is a straight line drawn through the center and terminated both ways by the circumference, as AC in Fig.
Página 15 - ... in which they affect the eye of the observer, under varying conditions : in the latter, it enables us to make representations of visible objects that shall affect the eye in the same manner as the objects themselves would, if viewed from a certain fixed point. " Perspective is the art of drawing on a plane the appearances of any figures by the rules of geometry. "In order to understand the principles of this art, we must consider that a picture painted in its utmost degree of perfection, ought...
Página 1 - A straight line, or right line, is that which lies evenly between its extreme points ; or, as defined by Archimedes, it is the shortest distance between two AB points, as A B.
Página ix - ... to thofe who are not acquainted with Geometry ; but to fuch as have received a .mathematical education, and comprehend the eleventh book of Euclid, Dr. Brook Taylor's treatifes are fufficient for the theory, and fuch perfons will require but little afliftance in the practice.
Página ix - Perfpective, but alfo prevent much error in the future works of thofe artifts who have not opportunity to enter deeply into the fcience. The author cannot conclude this preface without obferving, that in the courfe of the work he certainly would have endeavoured to give more copious...
Página 182 - ... a right angle. XXVIII. An obtufe angled triangle, is that which has an obtufe angle. XXIX. An acute angled triangle, is that which has three acute angles. XXX. Of four fided figures, a fquare is that which has all its fides equal, and all its angles right angles.
Página 17 - ... nature belonging to them. But in this book I make no difference between the plane of the horizon, and any other plane...
Página viii - This citcumftance has never before been attended to by writers on thefubject; and therefore it may be hoped, that this will operate as an improvement, and greatly facilitate the...