Part 12

1897. Insect Life. pp. 349. New York.

Directions for the study of insects.

CLEMENTS, F. E.

1905. Research Methods in Ecology. pp. 334. Lincoln, Nebraska.

Important for methods of study in plant ecology, partly also applicable to animals; photography, and instruments for the study of environments.

DAHL, F.

1901. Was ist ein Experiment, was Statistik in der Ethologie? Biol. Centralbl., Bd. XXI, pp. 675-681.

1903. Winke für ein wissenschaftlicher Sammeln von Thieren. Sitzungs-Ber. der Gesell. naturfor. Freunde zu Berlin. Jahrg. 1903, pp. 444-475.

This contains, in addition to its suggestions on collecting, an interesting outline or classification of animal habitats (Cf. also Enderlein, 1908, pp. 72-77). This is not a genetic classification. Dahl’s list of habitats will prove very suggestive to the student who wishes to develop the genetic system of classification. Ultimately we must, of course, develop the latter system.

1904. Kurze Anleitung zum wissenschaftlichen Sammeln und zum Conservieren von Thieren. pp. 59. Jena.

An enlarged edition of the preceding paper.

DAVENPORT, C. B.

1904. Statistical Variation with Special Reference to Biological Variation. Second, Revised Edition. pp. 223. New York.

FORBES, S. A.

1907. An Ornithological Cross-Section of Illinois in Autumn. Bull. Ill. State Lab. Nat. His., Vol. VII, pp. 305-335.

1908. The Mid-Summer Bird Life of Illinois: A Statistical Study. Amer. Nat., Vol. XLII, pp. 505-519.

FLAHAULT, C., and SCHRÖTER, C.

1910. Phytogeographical Nomenclature. Reports and Propositions, IIIᵉ Cong. Inter. de Bot. 1910. Bruxelles. pp. 28. Zurich.

A very valuable discussion of ecological nomenclature for plants. Defines the use of such terms as biology, ecology, habitat, association, formation, etc. It is very desirable that the plant and animal ecologists coöperate as much as possible in this subject.

GIBSON, W. H.

1905. Camp Life in the Woods and the Tricks of Trapping and Trap Making. pp. 300. New York.

A book for boys, but not without value to the older student of live animals.

HENSEN, V.

1887. Ueber die Bestimmung des Plankton’s oder des in Meere treibenden Materials an Pflanzen und Thieren; nebst Anhang. Fünfter Ber. der Komm. zur wissensch. Untersuch. d. deutschen Meere in Kiel für die Jahre 1882 bis 1886, pp. 1-107, III-XVIII, Berlin.

This appears to be the original account of quantitative studies as applied to plants and animals of an association. These methods have been extended to the sea bottom by Petersen, to fresh water by many students, to land animals mainly by Dahl, and in recent years to plants by Clements and others.

HERRICK, C. L.

1905. Home Life of Wild Birds. Revised Edition, pp. 255. New York.

Very valuable for suggestions on the study of live birds and how to photograph them.