The teaching of drawing : its aims and methods (1910)
Polak, Solomon, Quilter, Harry Charles · London : W.B. Clive, University Tutorial Press · leaf 109
aken that these straight linesare drawn tangentially to the curves of the ends. The pencil may be employed occasionally in order totest the judgment as to the apparent degree of curvatureof the ends or their direction or proportions, as whendealing with purely straight-lined forms. Thus, the… … Fig. 99. inclined to the ground, so as to cover the line of the axis, but not to recede with it. The numerous common objects of cylindrical form, such as jars, pans, etc., already mentioned (Chaps. YI. and VII.), may now be drawn in positionsother than upright. 112. The Cone, Trun-cated Cone, and…
Drawing
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![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-201-122.webp)
