. . "McKim, Mead & White." . . "F. J. Sarmiento & Co." . . "Healy & Millet." . . "Peabody & Stearns (Boston, Mass.)" . . "World's Columbian Exposition (1893 : Chicago, Ill.)" . . . . . . . . . . . . . . . . . . . . . "Halftones" . . . . "[Chemigraph halftone illustrations of the World's Columbian Exposition in Portfolio of views]" . . . . . . . . . . . . . . . . . . "Includes \"36 'Chemigraph' half-tone (duo-tones) illustrations from photographs of the Exposition grounds. Plates by the National Chemigraph Co., Chemigraph patented March 21, 1893.\"--Hanson Collection catalog, p. 116." . . . . . "Chemigraphs" . "Relief halftones" . . . . . . . . "Van Brunt & Howe." . .