Supplementary to, and in some cases a necessary substitute for, a reference series of authentically determined specimens, is one which the student is able to name for himself, by the study of the literature. Without some special training this may become dangerous ground to tread upon, but every now and then some young student begins in this way and develops such care in determining his own collections, that the method cannot be wholly condemned. Such work in itself has fascinations, and one may easily occupy all one’s time with it. From the ecological standpoint to stop with determinations only would be like acquiring a certain vocabulary, and stopping before learning how to use the language. Ecological work aims to use the names of species as the most concise method of referring to kinds of animals whose interrelations are to be described and interpreted. Taxonomy is the tool. V. REFERENCES TO SCIENTIFIC TECHNIQUE 1. The Scientific Method. 2. Directions for Collecting and Preserving Specimens, Photographing, Surveying, and Other Phases of Technique. 3. The Preparation of Papers for Publication and Proof Reading. _1. The Scientific Method_ CHAMBERLIN, T. C. 1897. The Method of Multiple Working Hypotheses. Jour. Geol., Vol. V, pp. 837-848. 1906. The Method of the Earth Sciences. Pop. Sci. Mo., Vol. LXVI, pp. 66-75. Inter. Cong. of Arts and Sciences, St. Louis, Vol. IV, pp. 477-487. Very important papers and worthy of careful study. GILBERT, G. K. 1886. The Inculcation of Scientific Method by Example, with an Illustration drawn from the Quaternary Geology of Utah. Amer. Jour. Sci., (3), Vol. XXXI, pp. 284-299. 1887. Special Processes of Research. Amer. Jour. Sci., (3), Vol. XXXIII, pp. 452-473. MELDOLA, R. 1895. The Speculative Method in Entomology. Trans. Ent. Soc., London, 1895, pp. XLVIII-LXXIII. VAN HISE, C. R. 1902. The Training and Work of a Geologist. Science, N. S., Vol. XVI, pp. 321-334. KEYES, C. R. 1898. The Genetic Classification of Geological Phenomena. Jour. Geol., Vol. VI, pp. 809-815. Valuable for its discussion of the criteria used in genetic studies. VAN HISE, C. R. 1904. The Problems of Geology. Jour. Geol., Vol. XII, pp. 589-616; Inter. Cong. Arts and Sciences, St. Louis, Vol. IV, pp. 525-548. 1906. An excellent discussion of the energy, agent, and process method of investigation. I have seen no similar discussion applied to biological or zoölogical subjects. BOAS, F. 1896. The Limitations of the Comparative Method of Anthropology. Science, N. S., Vol. IV, pp. 901-908. A suggestive paper for the student of ecology who uses the comparative method in his own work. 1904. The History of Anthropology. Science, N. S., Vol. XX, pp. 513-524. Application of the genetic and historical method to the study of man. MILL, J. S.