1910. How to Study Birds. A Practical Guide for Amateur Bird-Lovers and Camera-Hunters, pp. 272. New York. Outing Publishing Co.

Intended primarily for beginners in bird study, but contains valuable practical advice on methods of studying and photographing live birds which will aid the ecologist. Consult also Kearton (1907), Chapman (1900), and Herrick (1905).

Kearton, R.

1907. Wild Life at Home: How to Study and Photograph It. New and Revised Edition, pp. 204. London.

Kephart, H.

1912. The Book of Camping and Woodcraft. pp. 331. Fifth Edition. Outing Publishing Co.

This is the best all-round book on the technique of camping and living in the wilderness which I have seen. It includes direction for selecting outfits, making camps, cookery, pests in the woods, blazes and survey lines, rations, emergency foods, getting lost, accidents, etc.

Knauthe, K.

1907. Das Süsswasser, chemische, biologische, und bakteriologische Untersuchungsmethoden unter besonderer Berücksichtigung der Biologie und der fischereiwirtschaftlichen Praxis. pp. 663. Neudamm.

A very important work on the technique of fresh water biology.