The builder & workman's new director : comprehending definitions and descriptions of the component parts of buildings. the principles of construction and the geometrical development of the principal difficulties that usually occur in the different branches of mechanical professions employed in the erection of edifices (1824)
Nicholson, Peter, 1765-1844, author · [London] : John Day, Mark King, James Pringle, Henry Joll, Edward Sanders, Robert Johnson, William Foster, John Wright & Thomas Prosser · leaf 37
13 DEFINITIONS. (69) Def. 69. One angle B is to another E, as the magnitude of the arc ac, de- scribed between the legs of the one angle, is to that df, described between the legs of the other, with the same radius. … Thus, if the arc d/ be twice the arc ac, then the angle E is twiee the angle B ; or, if the greater arc be di- vided into equal parts, then, whatever number of parts the lesser arc contains of the parts of the greater arc, the lesser angle will be the like parts of the greater: this will be evident…
Architecture · Building · Perspective
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
