ARCHITECTURE.
Recent scientific researches have shown that seeds that have been embedded with the barnyard refuse used in making adobe are preserved indefinitely. Consequently, by dissolving out seeds contained in adobes from the walls of old buildings whose date of erection is known, the approximate date of introduction of various cultivated plants in the region may be ascertained.
See J. W. Adams, "Adobe as a Building Material for the Plains," Colorado Agric. Expt. Sta. Bull. 174 (IWO) ; Lee McCrae, "The Revival of the Adobe," Keith's Magazine, vol. xlv., p. (1921) Torrey Connor, "The Art and Uses of Adobe," House Beautiful, vol. li., p. 78-79 (1922) and Roy M. Singer, "Adobe House Con struction," National Builder, vol. pp. (1924).