[13] “The Orthographic Beauty of the Parthenon,” &c. [14] “The Orthographic Beauty of the Parthenon,” &c. [15] Ibid. [16] “The Harmonic Law of Nature applied to Architectural Design.” [17] “Physio-philosophy.” By Dr Oken. Translated by Talk; and published by the Ray Society. London, 1848. [18] “The Science of those Proportions by which the Human Head and Countenance, as represented in Works of ancient Greek Art, are distinguished from those of ordinary Nature.” [19] “The Geometric Beauty of the Human Figure Defined,” &c., and “The Natural Principles of Beauty Developed in the Human Figure.” [20] “The Geometric Beauty of the Human Figure Defined,” &c. [21] “Essay on Ornamental Design,” &c., and “The Geometric Beauty of the Human Figure,” &c. [22] “A Nomenclature of Colours, applicable to the Arts and Natural Sciences,” &c., &c. [23] See pp. 24 and 25. [24] “The Principles of Beauty in Colouring Systematised,” Fourteen Diagrams, each containing Six Colours and Hues. “A Nomenclature of Colours,” &c., Forty Diagrams, each containing Twelve Examples of Colours, Hues, Tints, and Shades. “The Laws of Harmonious Colouring,” &c., One Diagram, containing Eighteen Colours and Hues. [25] “Etchings Representing the Best Examples of Grecian and Roman Architectural Ornament, drawn from the Originals,” &c. By Charles Heathcote Tatham, Architect. London: Priestly and Weale. 1826. [26] “The Orthographic Beauty of the Parthenon,” &c. [27] “Science of those Proportions,” &c. [28] Abbé Barthélémie’s “Travels of Anacharsis in Greece,” vol iv., pp. 193, 195. [29] Abbé Barthélémie (vol. ii., pp. 168, 169), who cites as his authorities, Cicer. De Nat. Deor., lib. i., cap. ii., t. 2, p. 405; Justin Mart., Ovat. ad Gent., p. 10; Aristot. Metaph., lib. i., cap. v., t. 2, p. 845. [30] Müller’s “Ancient Art and its Remains.” [31] “Anacharsis’ Travels in Greece.” By the Abbé Barthélémie, vol. ii., p. 325. [32] “Anacharsis’ Travels in Greece.” By the Abbé Barthélémie, vol. vi., p. 225. The authorities the Abbé quotes are—Quintil., lib. xii., cap. x., p. 744; Plin., lib. xxxv., cap. ix., p. 691. [33] Müller’s “Archæology of Art,” &c. Works by the Same Author. I. In royal 8vo, with Copperplate Illustrations, price 2s. 6d., THE HARMONIC LAW OF NATURE APPLIED TO ARCHITECTURAL DESIGN. _From the Athenæum._ The beauty of the theory is its universality, and its simplicity. In nature, the Creator accomplished his purposes by the simplest means—the harmony of nature is indestructible and self-restoring. Mr Hay’s book on the “Parthenon,” on the “Natural Principles of Beauty as developed in the Human Figure,” his “Principles of Symmetrical Beauty,” his “Principles of Colouring, and Nomenclature of Colours,” his “Science of Proportion,” and “Essay on Ornamental Design,” we have already noticed with praise as the results of philosophical and original thought. _From the Daily News._