A Practical Treatise of Perspective, on the Principles of Dr. Brook TaylorLeigh & S. Sotheby, 1806 - 313 páginas |
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Página 4
... of thofe planes .. line If two planes crofs or cut each other , fo that they have equal spaces between them , they are then at right angles , or perpendicular to each other . Example Example of Planes . III . The faces , or GEOMETRY .
... of thofe planes .. line If two planes crofs or cut each other , fo that they have equal spaces between them , they are then at right angles , or perpendicular to each other . Example Example of Planes . III . The faces , or GEOMETRY .
Página 13
... space between C and F into three equal parts , and fet one of these parts from 3 to 4 . Take the space from C to 4 , and fet it on upon the line C A 2 to 5 , making C 5 equal to C 4 . Then , upon the space between 4 and 5 as the bafe ...
... space between C and F into three equal parts , and fet one of these parts from 3 to 4 . Take the space from C to 4 , and fet it on upon the line C A 2 to 5 , making C 5 equal to C 4 . Then , upon the space between 4 and 5 as the bafe ...
Página 16
... space between the window and the object , thofe measures being applied by a proportionate scale to certain lines drawn agreeably to the rules of the science , upon a plane , or flat tablet , a reprefentation will be produced fimilar to ...
... space between the window and the object , thofe measures being applied by a proportionate scale to certain lines drawn agreeably to the rules of the science , upon a plane , or flat tablet , a reprefentation will be produced fimilar to ...
Página 26
... space between it and the eye , may be at least equal to the height or width of that house . So alfo , in viewing a landscape or street , or the interior of a build- ing , the ftudent may obferve , that he will not fee any object , nor ...
... space between it and the eye , may be at least equal to the height or width of that house . So alfo , in viewing a landscape or street , or the interior of a build- ing , the ftudent may obferve , that he will not fee any object , nor ...
Página 28
... space from C 1 to D 1 , is the distance of the picture to the figure D 1 ; and from C 2 to D 2 , reprefents the diftance of the picture to the figure D 2. Here it will not be improper to observe , that at figure D 2 will be the best ...
... space from C 1 to D 1 , is the distance of the picture to the figure D 1 ; and from C 2 to D 2 , reprefents the diftance of the picture to the figure D 2. Here it will not be improper to observe , that at figure D 2 will be the best ...
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Términos y frases comunes
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...