29 
Pammel, L. H.: A comparative study of the vegeta- 
TTOH OF SWAMP, CLAY, AND SANDSTONE AREAS IN WEST¬ 
ERN Wisconsin, southeastern Minnesota, north¬ 
eastern, CENTRAL, AND SOUTHEASTERN IoWA. PrOC. 
Davenport Acad. Sci., v. 10 , 1904-05, p. 32-126, 42 
fig. (mcl. maps). 1905. 
Bibliography, p. 34 . Reprinted as Contrib. Bot. 
Dept., Iowa State Col. Agr., 28. Am ps, 1905. 
Parish, S. B. : Plant ecology and floristics of Salton 
sink. In Macdougal, D. T. The Salton Sea . . . 
p. 85-114. (Carnegie Inst., Washington, Pub., 193.) 
Washington, 1914. ’ ’ ’ 
Plummer, F. G.: Forest conditions in the Cascade 
range, Washington, between the Washington and 
Mount Rainier forest reserves. U. S. Geol. Sur¬ 
vey, Prof. Paper 6 , 42 p., 11 pi. (6 maps). Wash¬ 
ington, 1902. 
Chaparral : studies in the dwarf forests, or 
elfin-wood, of southern California. U. S. Dept. 
Agr., Forest Serv., Bui. 85, 48 p., 7 fig., 8 pi. (1 map). 
Washington, 1911. 
Pool, R. J. : A STUDY OF THE VEGETATION OF THE SAND¬ 
HILLS of Nebraska. Minn. Bot. Studies, yol. 4, pt. 
3, p. 189-312, 16 fig., pi. 26-40, map. Minneapolis, 
1914. 
Literature cited, p. 308-312. 
Pound, Roscoe, and Clements, F. E.: Phytogeography of 
Nebraska. I. General survey. Univ, Nebr., Bot. 
Survey Nebr., no. 8 , 442 p., 4 maps. Bibliography, 
p. 22-30. Lincoln, 1900. 
Record, S. J. : Forest conditions of the Ozark region 
of Missouri. Mo. Agr. Exp. Sta,, Bui. 89, p. 195-280, 
6 fig., map. Columbia, 1910. 
Rixon, T. F.: Forest conditions in the Gila River 
forest reserve, New Mexico. U. S. Geol. Survey, 
Prof. Paper 39, 89 p., 2 pi. (1 map). Washington, 
1905. 
Rohbins, W. W.: Native vegetation and climate of 
Colorado in their relation to agriculture. Colo. 
Agr. Exp. Sta., Bui. 224, 56 p., 20 fig. Ft. Collins, 
1917. 
Roth, Filibert, and Fernow, B. E. *. Forestry conditions 
AND INTERESTS OF WISCONSIN, WITH A DISCUSSION BY 
B. E. Fernow. IJ. S. Dept. Agr., Forest Serv., BuL 
16, 76 p., map. Washington, 1898. 
Sampson, A. W.: Natural revegetation of range lands 
BASED UPON GROWTH REQUIREMENTS AND LIFE HISTORY 
of the vegetation. Journ. Agr. Research, vol. 3, 
no. 2, p. 93-148, 6 fig., pi. 12-23. Washington, 1914. 
Sampson, H. C.: An ecological survey of the prairie 
vegetation of Illinois. Bui. Ill. Nat. Hist. Survey, 
1921. v. 13, p. 523-577, pi. 48-77, 2 maps. Urbana, 
1921. 
Sargent, C. S.: Report on the forests of North 
America (exclusive of Mexico). U. S. Census Off., 
10th Census, 1880, v. 9, 612 p., 39 maps. Wash¬ 
ington, 1884. 
Sarvis, J. T. : Composition and density of the native 
VEGETATION IN THE VICINITY OF THE NORTHERN GREAT 
Plains field station. In Joum. Agr. Research, 
1-19, p. 63-72, pi. 12-14. Washington, 1920. 
Shaler, N. S.: Forests of North America. Scribner’s 
Mag., v. 1 , no. 5, p. 561-580, illus. New York, 1887. 
Shantz, H. L.: Natural vegetation as an indicator of 
THE CAPABILITIES OF LAND FOR CROP PRODUCTION IN 
the Great Plains area. U. S. Dept. Agr., Bur. 
Plant Indus., Bui. 201 , 100 p., 23 fig., 6 pi. Wash¬ 
ington, 1911. 
The natural vegetation of the Great Plains 
Region. In Ann. Assoc. Amer. Geogr., vol. 13, no. 
2 , p. 81-107, pi. 3-8, map. Albany, 1923. 
Shimek, B.: The distribution of forest trees in Iowa. 
In Proc. Iowa Acad. Sci., vol. 7, 1899, p. 47-59, pi. 4. 
Des Moines, 1900. 
The prairies. Bui. Lab. Nat. Hist., State Univ. 
Iowa, vol. 6 , no. 2 , p. 169-240, 14 pi. (1 map). Bibli¬ 
ography, p. 231-240. Iowa City, 1911. 
Shreve, Forrest: The vegetation of a desert mountain 
RANGE AS CONDITIONED BY CLIMATIC FACTORS. 112 p., 
36 pi., map. (Carnegie Inst., Washington, Pub. 
217.) Washington, 1915. 
A MAP OF THE VEGETATION OF THE UNITED STATES. 
Geogr. Rev., vol. 3, no. 2 , p. 119-125, map. New 
York, 1917. 
Smith, J. G.: Forage conditions of the prairie re¬ 
gion. U. S. Dept. Agr. Yearbook, 1895, p. 301-324, 
fig. 70-74. Washington, 1896. 
Sterrett, W. D.: Scrub pine. U. S. Dept. Agr., Forest 
Serv., Bui. 94, 27 p., pi. Washington, 1911. 
Sterrett, W. D.: The ashes : their characteristics and 
management. U. S. Dept. Agr., Bui. 299, 88 p., 
16 pi. (2 maps). Washington, 1915. 
Sudworth, G. B.: Forest atlas. Geographic distribu¬ 
tion of North American trees, pt. 1 , maps 
(partly col.) U. S. Dept. Agr., Forest Service. 
Washington, 1913. 
Swallow, G. C.: Geological report of the country 
ALONG THE LINE OF THE SOUTHWESTERN BRANCH OF 
the Pacific Railroad of Missouri. 93 p., map. 
St. Louis, 1859. 
Thornber, J. J.: The prairie-grass formation in re¬ 
gion I. Univ. Nebr. Bot. Survey Nebr., no. 5, p. 
19-143, pi., map. Lincoln, 1901. 
The grazing ranges of Arizona. Ariz. Agr. Exp. 
Sta., Bui. 65, p. 245-360, 5 fig., 12 pi., map. Tucson, 
1910. 
Tracy, S. M.: A report upon the forage plants and 
FORAGE RESOURCES OF THE GULF STATES. U. S. Dept. 
Agr., Div. Agros., Bui. 15, 55 p., 20 fig. Washington, 
1898. 
IT. S. Department of Agriculture, Forestry Division: Re¬ 
port ON THE FOREST CONDITIONS OF THE RoCKY MOUN¬ 
TAINS, and other papers ... U. S. Dept. Ag r., For¬ 
estry Div., Bui. 2, 252 p., fold. map. Nine papers 
by different authors. Washington, 1888. 
ADDITIONAL COPIES 
OF THIS PUBLICATION MAT BE PROCURED FROM 
THE SUPERINTENDENT OF DOCUMENTS 
GOVERNMENT PRINTING OFFICE 
•WASHINGTON, D. C. 
AT 
75 CENTS PER COPY 
V 
XT. S. Department of Agriculture, Bureau of Soils: Field 
operations, 1899-1913 [Reports 1—15]. Maps to ac¬ 
company each report. Washington, 1900-1916. 
Later reports are issued by counties in the form 
of advance sheets pending publication of annual re¬ 
reports. 
TT. S. Geological Survey: Annual reports 19-21, 1897- 
1900, pt. 5, Forest reserves. Washington, 1899- 
1900. 
IT. S. War Department: Reports of explorations and 
SURVEYS, TO ASCERTAIN THE MOST PRACTICABLE AND 
ECONOMICAL ROUTE FOR A RAILROAD FROM THE MISSIS¬ 
SIPPI River to the Pacific Ocean, 1853-1856. 12 
vol. in 13, illus. Washington, 1855-1860. 
Vestal, A. G.: A black-soil prairie station in north¬ 
eastern Illinois. Bui. Torrey Bot. Club, vol. 41, 
no. 7, p. 351-363, 7 fig. Lancaster, Pa., 1914. 
Watson, Sereno, and others: Botany. 525 p., 40 pi., .1 
map. (Rpt. [U. S.] Geol. Expl. 40th Parallel, v. 
5). Washington, 1871. 
Weaver, J. E.: A study of the vegetation of south¬ 
eastern Washington and adjacent Idaho. Univ. 
Studies, Univ. Nebr., vol. 17, no< 1, 131 p., 48 fig. 
Literature cited, p. 113-114. Lincoln, 1917. 
West Virginia Geological Survey. Map of West Vir¬ 
ginia SHOWING VIRGIN AND CUT-OVER FOREST AREAS . . . 
fold. Baltimore, [1911?]. 
Whitford, K. N.: The genetic development of the 
FORESTS OF NORTHERN MICHIGAN ; A STUDY IN PHYSIO¬ 
GRAPHIC ecology. Bot. Gaz., vol. 31, no. 5, p. 289- 
325, 18 fig. Chicago, 1901. 
Wilcox, E. V.: The grazing industry. Hawaii Agr. 
Exp. Sta. 91 p., Bui. Honolulu, 1911. 
Williamson, A. W.: Cottonwood in the Mississippi val¬ 
ley. U. S. Dept. Agr., Bui. 24, 62 p., illus., 6 pi. 
Washington, .1913. 
Woolsey, T. S., jr.: Western yellow pine in Arizona 
and New Mexico. U. S. Dept. Agr., Forest Serv., 
Bui. 101 , 64 p., 11 fig., 4 pi. Washington, 1911. 
Woolsey, T. S. jr., and Chapman, H. H.: Norway pine in 
the lake States. U. S. Dept. Agr., Bui. 139, 42 
p., 1 fig., 6 pi. Washington, 1914. 
Wooton. E. 0 ., and Standley, P. C.: Carrying capacity 
OF GRAZING RANGES IN SOUTHERN ARIZONA. U. S. 
Dept. Agr., Bui. 367, 40 p., 10 pi., maps. Washing¬ 
ton, 1916. 
Zon, Raphael: Chestnut in southern Maryland. U. 
S. Dept. Agr., Bur. Forestry, Bui. 53, 31 p., 5 pi. 
Washington, 1904. 
Loblolly pine in eastern Texas, with special 
REFERENCE TO THE PRODUCTION OF CROSS-TIES. U. S. 
Dept. Agr., Forest Serv., Bui. 64, 53 p., 2 fig., 4 pi. 
Washington, 1905. 
Balsam fir. U. S. Dept. Agr., Bui. 55 , 68 p., 8 fig., 
2 pi. Bibliography, p. 68 . Washington, 1914. 
