The naval architect's and shipbuilder's pocket-book of formulae, rules, and tables and marine engineer's and surveyor's handy book of reference (1884)
Mackrow, Clement · London, C. Lockwood and co. · leaf 19
bythe object G, On the point d withany convenient radius describethe arc cc, and make the arctwice the radius dc in length ;through c draw the line dce, andon e describe another arc;^^ equal in length to the radius dc ;draw the line efr equal to efd; from r describe the arc gg^.equal in length to… … Fig. 14. 14. To ascertain the distance geometrically of an inaccessible-object on a level plane. (Fig. 14.) Let it be required to find the distancebetween A and b, a being inaccessible.Produce AB to any point D, and bisectBD in c; through D draw Dr/, making-any angle with DA, and take DC and…
