Practical draughtsmen's work, with numerous engravings and diagrams (1903)
Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 82
t round Fj CF2, tie the ends to make it continuous, slip itover the pegs Fi and Fo, and then with a stick p, starting at c, thewhole ellipse can be struck in one continuous curve. There is noneed to go into the garden in order to practise this method; twopins and a piece of cotton on a sheet of… … Fig. 136.—Gardeners Method of Constructing an Ellipse. semicircular arches. In the ordinary way, an arch crosses atright angles to the opening it spans, but in the case of a railway
Mechanical drawing
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