The gardener's magazine and register of rural & domestic improvement (1826)
Loudon, J. C. (John Claudius), 1783-1843, A. & R. Spottiswoode, printer, United States. Patent Office. Scientific Library, former owner DSI · London : Longman, Rees, Orme, Brown and Green · leaf 490
464 New Mode of forming curved Lines, … Fig. 76. differs from the above only in this, that the anglesare taken outside. Set up three pegs, say 50 links apart, as be-fore, and fix the cross staff in ;•, with one sight on the line r b a. and the other point-ing to c. Thenmeasure r b and r c,and remove to theline e c b; draw e dequal to r…
