378 HARPER: BOTANICAL CROSS-SECTION OF MISSISSIPPI 
River, instead of to the coast as in most other parts of the coastal 
plain, and therefore running north and south), and I took ad- 
vantage of the opportunity to make a more complete analysis of 
the vegetation of each division than had been attempted in that 
part of the country before. The observations made on that 
trip, besides embodying some previously unrecorded facts, have 
led to some conclusions which seem sufficiently new to be offered 
to the botanical public. . 
Previous literature. Besides the works of Dr. Hilgard already 
noted, and a few papers on particular regions, which will be men- 
tioned farther on, the following have an important bearing on the 
phytogeographical problems of northern Mississippi. 
Campbell & Ruffner. A physical survey extending from Atlanta, Ga., 
across Alabama and Mississippi to the Mississippi River, along the 
_ line of the Georgia Pacific Railway, embracing the geology, topog- 
raphy, minerals, soils, climate, forests, and agricultural and manu- 
facturing resources of the country. 8vo. 147 pp. and 2 folded 
maps. New York, 1883. (Pages 92-96 and 102-107 relate to 
Mississippi.) 
a 
B. Hurt. Mississippi: its climate, soil, productions, and agri- 
cultural capabilities. U.S. Dept. Agric. Misc. Spec. Rep. no. 3- 
89 pp. 1883?. (Contains an annotated list of trees, among other 
things.) 
Sargent & Mohr. (Forests of) Mississippi. U. S. Tenth Census 9: 
530-536, and colored map. 1884. 
W. J. McGee. The Lafayette formation (in Mississippi). U.S. Geol. 
Surv. Ann. Rep. 121: 451-461. 1892. 
L. C. Johnson. (Underground waters of) Mississippi. U. S. Geol. 
Surv. Water Supply & Irrigation Paper 114: 171-178. f. 23 
(geological map). 1905. 
A. F. Crider. Geology and mineral resources of Mississippi. U. S: 
Geol. Surv. Bull. 283. 99 pp. 1906. 
Crider & Johnson. Summary of the underground-water resources of 
Mississippi. U. S. Geol. Surv. Water Supply & Irrigation Paper 
159. 86 pp. 6 plates (including colored geological map), 11 text- 
figs. 1906. 
A. F. Crider. A provisional [sic] geologic and topographic map of 
Mississippi. 20 X 28 in., colored. First published in 1907, and 
issued in connection with several different bulletins of the Mississippi 
State Geological Survey. 
