From Introduction: "This report presents the results of an investigation of the physical properties and characteristics of bauxite, with special reference to the possibility of applying commercial methods of concentration to low-grade bauxite."

From Introduction: "Figure 1 shows the location of sources that have been either exploited or seriously considered at one time or another, super-imposed upon a map indicating by small letters the order of consumption of K2O in the leading States; the amount used in these States, together with the percentage of the total consumption of potash used as fertilizer in the United States in 1939, is given in table 1. Figure 2 shows the domestic production and total consumption of potassium salts, in terms of tons of K2O, with the value per unit at the plants, for each year since 1913. Considered together, these two figures tell a significant story."

Report discussing earthquake activity in the United States during 1931. The report is broken down by regions and has sections for specific earthquakes.

Map showing biological resources (aquatic organisms, terrestrial organisms, land use, etc.) in the Mobile region of the Gulf of Mexico coast area. Scale 1:250,000.

Map showing various sites and features (recreation sites, landfills, power plants, historic sites, transportation, etc.) in the North Islands region of the Mississippi Deltaic Plain area of the coastline. Scale 1:100,000.

Map showing various sites and features (recreation sites, landfills, power plants, historic sites, transportation, etc.) in the Mobile region of the Mississippi Deltaic Plain area of the coastline. Scale 1:100,000.

Map showing mineral resources (oil, gas, sand, gravel, etc.) in the Mobile region of the Mississippi Deltaic Plain area of the coastline. Scale 1:100,000.

Map showing mineral resources (oil, gas, sand, gravel, etc.) in the Biloxi region of the Mississippi Deltaic Plain area of the coastline. Scale 1:100,000.

Map showing mineral resources (oil, gas, sand, gravel, etc.) in the North Islands region of the Mississippi Deltaic Plain area of the coastline. Scale 1:100,000.

Map showing various sites and features (recreation sites, landfills, power plants, historic sites, transportation, etc.) in the Biloxi region of the Mississippi Deltaic Plain area of the coastline. Scale 1:100,000.

Map showing biological resources (birds, oysters, fishes, grasses, etc.) in the Mobile region of the Mississippi Deltaic Plain area of the coastline. Scale 1:100,000.

Map showing biological resources (birds, oysters, fishes, grasses, etc.) in the Biloxi region of the Mississippi Deltaic Plain area of the coastline. Scale 1:100,000.

Map showing biological resources (birds, oysters, fishes, grasses, etc.) in the North Islands region of the Mississippi Deltaic Plain area of the coastline. Scale 1:100,000.

Map showing factors that affect the shoreline and wetlands (flood surges, control structures, shoreline stabilization, etc.) in the Biloxi region of the Mississippi Deltaic Plain area of the coastline. Scale 1:100,000.

Map showing factors that affect the shoreline and wetlands (flood surges, control structures, shoreline stabilization, etc.) in the North Islands region of the Mississippi Deltaic Plain area of the coastline. Scale 1:100,000.

Map showing hydrologic resources (water quality, groundwater availability, precipitation, etc.) in the North Islands region of the Mississippi Deltaic Plain area of the coastline. Scale 1:100,000.

Map showing various kinds of soils and landforms in the Mobile region of the Mississippi Deltaic Plain area of the coastline. Scale 1:100,000.

Map showing factors that affect the shoreline and wetlands (flood surges, control structures, shoreline stabilization, etc.) in the Mobile region of the Mississippi Deltaic Plain area of the coastline. Scale 1:100,000.

Map showing hydrologic resources (water quality, groundwater availability, precipitation, etc.) in the Mobile region of the Mississippi Deltaic Plain area of the coastline. Scale 1:100,000.

Map showing various kinds of soils and landforms in the Biloxi region of the Mississippi Deltaic Plain area of the coastline. Scale 1:100,000.

Map showing hydrologic resources (water quality, groundwater availability, precipitation, etc.) in the Biloxi region of the Mississippi Deltaic Plain area of the coastline. Scale 1:100,000.

Map showing various kinds of soils and landforms in the North Islands region of the Mississippi Deltaic Plain area of the coastline. Scale 1:100,000.

Report on model tests related to drainage structures for the Tennessee-Tombigbee Waterway to provide recommendations about construction.

From purpose and scope: The purpose of this study are to derive base flow estimates for representative parts of the Cretaceous and Tertiary clastic outcrop area as an aid in estimating recharge to the sand aquifers; to use base flow relations to estimate aquifer hydraulic parameters; and to relate the lithology of the aquifer to the streamflow duration curves.