Most of the plates are printed on both sides; Additional electronic version available through Internet Archive: Additional electronic version available through Internet Archive: https://archive.org/details/MAB.31962000726921_Images
Electronic reproduction of (manifestation): Billings, Robert William, 1813-1874. -- The power of form applied to geometric tracery. One hundred designs and their foundations resulting from one diagram. By Robert William Billings. -- Edinburgh and London, W. Blackwood and sons, 1851. -- vi, [7]-26 p. illus., plates, diagrs. 26 cm. -- Call number of original: NK1510 B54