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NATURALIST'S GUIDE TO THE AMERICAS 



BIBLIOGRAPHY 



Grinnell, J. 



1908. The Biota of the San Bernardino 



Mountains. Univ. Calif. Publ., 

 vol. 5, pp. 1-170, pis. 1-24. 



1913. A Distributional List of the 



Mammals of California. Proc. 

 Calif. A cad. Sci., 4th ser., vol. 

 3, pp. 265-390 pis. 15, 16. 



1914. An account of the Mammals and 



Birds of the Lower Colorado 

 Valley, with Especial Refer- 

 ence to the Distributional 

 Problems Presented. Univ. 

 Calif. Publ. Zool., vol. 12, pp. 

 51-294, pis. 3-13, 9 figs, in 

 text. 



1914. Barriers to Distribution as Re- 



gards Birds and Mammals. 

 American Naturalist, vol. 

 xlviii, April, 1914. 



1915. A Distributional List of the 



Birds of California. Pac. 

 Coast Avifauna (Cooper Or- 

 nithological Club), no. 11, 

 217 pp., 3 pis. (maps). 

 1917. Field Tests of Theories Concern- 

 ing Distributional Control. 

 American Naturalist, vol. li, 

 Feb., 1917. 



Grinnell, J., and Storer, T. I. 



1924. Animal Life in the Yosemite. 

 An account of the mammals, 

 birds, reptiles and amphibians 

 in a cross section of the Sierra 

 Nevada. (Univ. Calif. Press), 

 750 pp., 12 colored pis., 48 

 pis.. 2 maps. 65 figs, in text. 



Hall, H. M. 



1902. A Botanical Survey of San 

 Jacinto Mountain. Univ. 

 Calif. Publ. Bot., vol. 1, pp. 

 1-140, pis. 1-14. ' 



Hall, H. M., and Grinnell, J. 

 1919. Life-zone Indicators in Cali- 

 fornia. Proc. Calif. Acad. 

 Sci., 4th ser., vol. ix, no. 2, 

 pp. 37-67, June, 1919. 



Jepson, Willis Linn 



1909. The Trees of California. (Cun- 



ningham, Curtis & Welch, 

 San Francisco), 228 pp., 125 

 figs, in text. 

 Merriam, C. Hart 



1898. Life Zones and Crop Zones of the 



United States. U. S. Dept. 

 Agric., Div. Biol. Surv., Bull, 

 no. 10, 79 pp., 1 map (colored). 



1899. Results of a Biological Survey 



of Mount Shasta, California. 

 U. S. Dept. Agric., Div. Biol. 

 Surv., N. Amer. Fauna, no. 

 16, 179 pp., 5 pis., 46 figs, in 

 text. 



Smiley, F. J. 



1921. A report upon the boreal flora 

 of the Sierra Nevada of Cali- 

 fornia. Univ. Calif. Publ. Bot. 

 9, pp. 1-423, pis. 1-7. 



1915. Nature and Science on the 

 Pacific Coast. Edited under 

 auspices of the Pacific Coast 

 Comm. of the A. A. A. S. 

 (Paul Elder & Co., San Fran- 

 cisco), 302 pp., 19 figs, in text, 

 29 pis., 14 maps. 



5. NATIONAL FORESTS OF THE 

 NORTH PACIFIC DISTRICT (6) 



BY J. V. HOFMANN 



The National Forests of Oregon and 

 Washington include large areas of moun- 

 tainous country and some of the most 

 gigantic forests of the world. The total 

 National Forest area covers nearly 

 52,000,000 acres of which about 15,000,000 

 are in Oregon, and 10,000,000 acres in 

 Washington. 1 



The wide variety of conditions exist- 

 ing in these forests affords a mecca for 

 the nature lover and scientist alike. 

 These regions provide fertile fields for 

 the pursuit of studies in biology, geology 

 and any of the botanical sciences. 



The preservation of natural conditions 

 in the Pacific Northwest for purely 

 ecological or biological purposes, or for 

 keeping intact some of the forest forma- 

 tions that exist at the present time and 

 which will not be reproduced under 

 forest management, can best be served 

 by considering the region as a whole. 



The present economic conditions are 

 such that there will undoubtedly be 

 regions left untouched in this section 

 for several decades, and large areas of 

 types will be preserved without any 

 special effort. This will apply to this 

 region more than to various other 

 sections because the National Forest 

 land covers practically all the types and 

 conditions of the region, and portions 

 of these forests will be left untouched 

 until the lumber industry advances to 

 the stage where the last areas of the 

 present mature stands of timber are 



1 The national forest areas mentioned in this and 

 the following accounts are as of July 1, 1923. 



