Elements of plane and solid free-hand geometrical drawing, with lettering; and some elements of geometrical ornamental design, including the principals of harmonic angular ratios, etcIn three parts ..for draughtsmen and artisans; and teachers and students of industrial and mechanical drawing . he small oval similar to Fig. 29, theexact half, ending at the double lines near the top. The stand-ard is formed of an arc of the acute oval used in Fig. 4, butbroken, to secure shadow and variety, by the two , and when of full size, the moulding of these ringsshould be in ovals. 92; PL XI
Elements of plane and solid free-hand geometrical drawing, with lettering; and some elements of geometrical ornamental design, including the principals of harmonic angular ratios, etcIn three parts ..for draughtsmen and artisans; and teachers and students of industrial and mechanical drawing . he small oval similar to Fig. 29, theexact half, ending at the double lines near the top. The stand-ard is formed of an arc of the acute oval used in Fig. 4, butbroken, to secure shadow and variety, by the two , and when of full size, the moulding of these ringsshould be in ovals. 92; PL XII., Fig. 6, represents a fruit dish wholly composedof arcs of the oval, of Fig. 30. The flatter half, enlai-ged a tri-fle, is taken for the body of the dish, terminating on the lineCi Si of greatest width of the oval. The standard is composedof nearly the whole of the outline of the more convex half, %(?i,of the same oval. The Method hy Co-ordinates. 93. Compound, or waving curves may be sketched by amethod suggested by that of finding the location of a stream, orother irregular line, in a survey, viz., by distances to the given 124 FEEE-HAND GEOMETKICAL DRAWING. line, measured perpendicularly from points at given dfetaneeapart on a fixed straight line of reference, as « 5 in Fig. But in applying this method to the free design of some idealline of beauty, we are no longer bound by given distances eitheron, or from ah^ but can, according to the principles of this PartIII., substitute angular ratios for them. Thus, in Fig. 32, the left hand profile. A, is determined byco-ordinate distances. The height 04 is divided by trial into
Size: 2659px × 940px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmechanicaldrawing
