A Practical Treatise of Perspective, on the Principles of Dr. Brook TaylorLeigh & S. Sotheby, 1806 - 313 páginas |
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Página 16
... representation of the appearance of the object viewed by the fpectator . This will be better understood , if it be fuppofed that any perfon ftands looking through the glass of a window at fome diftant object or building ; let him fix ...
... representation of the appearance of the object viewed by the fpectator . This will be better understood , if it be fuppofed that any perfon ftands looking through the glass of a window at fome diftant object or building ; let him fix ...
Página 19
... representation being produced by the vanishing points . * See the Examples in the Jefuit's Perspective , pages 102-111 , both of which are very imperfect , particularly the example in the upper part of page 111 , which is totally falfe ...
... representation being produced by the vanishing points . * See the Examples in the Jefuit's Perspective , pages 102-111 , both of which are very imperfect , particularly the example in the upper part of page 111 , which is totally falfe ...
Página 29
... representations of a fimple fquare and cube , in true Per- fpective , as viewed in all directions , is to apply all those principles of science with refpect to practice , which must be used in the representation of all objects ...
... representations of a fimple fquare and cube , in true Per- fpective , as viewed in all directions , is to apply all those principles of science with refpect to practice , which must be used in the representation of all objects ...
Página 31
... representations of objects , difpofed in all the pofitions that are gene- rally required by the artift , upon the natural picture ; that is , when the plane of representation is perfectly vertical , and perpendicular to the axis of the ...
... representations of objects , difpofed in all the pofitions that are gene- rally required by the artift , upon the natural picture ; that is , when the plane of representation is perfectly vertical , and perpendicular to the axis of the ...
Página 34
... representations of objects , whofe faces , or fides , are parallel and perpendicular to the picture ; but when the objects to be reprefented have their faces or fides inclined to the picture , then the fifth article , which relates to ...
... representations of objects , whofe faces , or fides , are parallel and perpendicular to the picture ; but when the objects to be reprefented have their faces or fides inclined to the picture , then the fifth article , which relates to ...
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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...