36 leaves, folio (325 x 242). In French. Written in a fine calligraphic hand in black ink. Decorative Art Nouveau-style frontispiece in full watercolor; diagrams in ink (occasionally with wash). Bound in green gilt-lettered cloth. Provenance: Andrée Wehlen (binding, school prize inscription from Director Auguste Louvrier de Lajolais 27 July 1902 and stamp from L'École Nationale des Arts Décoratifs on flyleaf).

 

With a section on perspective and architecture at end, and with sections on the calculations of angles and surface area, and with pages of illustrated diagrams facing text throughout.  Lajolais, a painter, was devoted to reforming teaching of decorative art, which he achieved through is appointments as director of the L'École Nationale des Arts Décoratifs in Paris, Limoges, and Aubusson.