An Encyclopaedia of Architecture, Historical, Theoretical, and PracticalLongmans, Green, 1876 - 1395 pages |
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Page 290
... describe an arc cutting the given line at two points D and E ; and from the two centres D and E with any radius describe two arcs intersecting at F ; then draw AF , and it will be the perpendicular to BC required . - Otherwise When the ...
... describe an arc cutting the given line at two points D and E ; and from the two centres D and E with any radius describe two arcs intersecting at F ; then draw AF , and it will be the perpendicular to BC required . - Otherwise When the ...
Page 291
... describe the semicircle ADC , to meet which erect the perpendicular BD , which will be the mean proportional be- tween AB and BC sought . 1007. PROB . XI . To B D B find the centre of a circle . Draw any chord AB O Fig . 368 . B Fig ...
... describe the semicircle ADC , to meet which erect the perpendicular BD , which will be the mean proportional be- tween AB and BC sought . 1007. PROB . XI . To B D B find the centre of a circle . Draw any chord AB O Fig . 368 . B Fig ...
Page 306
... describe an ellipsis . 1076. PROB . II . The two diameters AB and ED of an ellipse being given in position and magnitude , to describe the curve through points . F 3 2 1 E F 123 C B Fig . 420 . E Fig . 421 . Let the two diameters cut ...
... describe an ellipsis . 1076. PROB . II . The two diameters AB and ED of an ellipse being given in position and magnitude , to describe the curve through points . F 3 2 1 E F 123 C B Fig . 420 . E Fig . 421 . Let the two diameters cut ...
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angle appears arch architect architecture axis base beam becomes bricks building built called cathedral centre century church circle colour columns common considered construction contained course covered curve describe diameter direction divided draw edifices effect employed equal erected examples experiments extremely face feet figure force four front give given greater half horizontal houses inches iron Italy joints length less lime material means mouldings nave nearly necessary observed obtained parallel period perpendicular piece placed plane portion practice principal produced Prop proportion quarries radius remains respect Roman roof round says side similar solid square stone strength style supposed surface temple thickness timber tower triangle upper vault vertical walls weight whereof whole wood