. The mental life of monkeys and apes; a study of ideational behavior. Monkeys; Apes. PLATE I. Figure 1.—Orang utan, Julius, in grove of live oaks back of the laboratory. Figure 2.—Portrait of same Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Yerkes, Robert Mearns, 1876-1956. Cambridge, Boston, Mass. New York, H. Holt

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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectapes, bookyear1916