1. The painter desirous of obtaining a correct knowledge of his trade should first acquaint himself with the nature and properties of the materials calling for his constant use, and the architect superintending the work of the painter should possess sufficient knowledge of the trade to intelligently criticize the character of the workmanship and materials.

Paint being a protective and preservative of both the structural and finishing materials of a building, edifices should be painted or varnished, according to the character of the material employed in construction, and the composition of the paint or varnish varied to suit the conditions of each case.

The utilitarian phase of painting becomes an element of architectural value, only when considered in conjunction with its decorative effect, wherein it combines the useful with the beautiful, making each administer to, and enhance the value of, the other.

The theory and practice of the painter's art may, therefore, be considered in regard to both plain surface painting and to decorating; the former dealing with pigments-their processes of manufacture, methods of application, and combination of colors, as well as the material best suited for each particular class or part of the work, regard being had to durability and utility; while the latter discusses the character of the material painted, the combinations of colors applied, and treatment of surfaces which are to receive the color, exclusively in consideration of the decorative effect.