Architectural drawing : a textbook that combines the parctical instructions and examples that the student needs, with the suggestive programs, supplementary problems, etc, required by the teacher, written by an architect of wide experience who has also taught the subject for years at Teachers' College, Columbia University, and Mechanics' Institute, New York . r the lesser arc. H, is the centre point for the greater arc. Application of Ellipse—Chart XIV. Fig 98. Scale1=1 Ft. A simple Colonial Doorway with elliptical trimmings are of stone. The door is of woodwith solid panels, no glass
Architectural drawing : a textbook that combines the parctical instructions and examples that the student needs, with the suggestive programs, supplementary problems, etc, required by the teacher, written by an architect of wide experience who has also taught the subject for years at Teachers' College, Columbia University, and Mechanics' Institute, New York . r the lesser arc. H, is the centre point for the greater arc. Application of Ellipse—Chart XIV. Fig 98. Scale1=1 Ft. A simple Colonial Doorway with elliptical trimmings are of stone. The door is of woodwith solid panels, no glass, and the Fleur-de-lis rep-resents a knocker. There is a Transom bar overthe door and a transom-sash above, which is glazed. Chart XV. Fig. 99 explains construction and meas-urements. Problem 2: Chart XIII. is used in producing theelliptical lines. Begin with a centre line. Draw line of bottom of door. Draw lower line of transom fixing height of doorat 7 0. Draw top line of transom 4 above, this is also thespringing-line for arch. Construct ellipse by drawing the three circles. Observe carefully the radial lines, they give di- 168 ARCHITECTURAL DRAWING rection to the joints between the voussoir stones,such radial lines for the lesser arcs converge at thenear centre point a, while those to the greater arcsradiate from the more distant centre point # ^/crcc/e /=/>?. FIG. 38. (jW mm )i
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectarchitecturaldrawing
