Letter from W. K. Dyer to Alex Bradford discussing the two year development, the various contracts resulting in modifications, and the availability of the fire fighting trucks and apparatuses.

Letter from Alex Bradford to the Oren Fire Apparatus Company discussing Mr. Bradford's interest in the Oren Fire Engine that was built specifically for the Defense Plant Corporation.

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."