Arizona republican., 1915-08-08
Gypsum

Probably few Arizonians are aware that we have an immense deposit of this mineral near Winkelman. We have given the facts concerning this deposit several times in these col umns. Some of the gypsum even at the surface is perfectly pure and in the test tube leaves no residual substance The deposit is exposed very plainly on the surface and could be practically quarried for years to come and immense large tonnages ob- tained. It seems unquestionably that this valuable deposit will receive some attention in the near future for the many purposes for which it can be utilized.
 The following is an occount of the
 Production of Gypsum in 1914
 According to G. F. Loughlin, of the U. s. Geological Survey the produc- tion of gypsum in the United States in 1914 was marked by decrease in tonnage but an increase in value, an increase due to a strong advance in the price of culcined gypsum, which more than offset a decline in price of crude gypsum.
 The quantity of crude gypsum mined in the United States in 1914 was 2,476,465 short tons, compared with 2,599.50S tons reported mined in 1913. a decrease of 123,043 tons. The gypsum sold without calcining and used principally as land plaster and as an ingredient in Portland cement and paint amounted to 443,6S7 short tons valued at s646,799. a decrease of 19,449 tons in quantity and Soo,- 267 in value in comparison with 1913, when the sales for similar purposes amounted to 463,136 short tons, valued at s697,066. The material market as calcined plaster was 1,656.O66 short tons, valued at s6,249,190, as com pared with 1,773.S49 tons. valued at s6,077,756, sold calcined in 1913. The total value of all gypsum marketed in 1914 was s6.S95. .9S9, as compared with s6.774,S22 in 1913, an increase of s121,- 167.
 Considerable quantities of gypsum plaster or staff" were used in the Panama Pacific Exposition buildings at San Francisco and in the Panama California Exposition buildings at San Diego, but they were not sufficient to offset the general decline in tonnage elsewhere. marked increase in the sale of calcined plaster was noted in 1902 and 1903. which also was largely due 10 the consumption of staff for buildings at the Louisiana Purchase Exposition buildings at St. Louis.
 Gypsum was produced in IS states and in Alaska in 1914, the same states reporting output in this year as in 1913. The relative rank of the three leading States has remained unchang- ed for the last four years, New York ranking first. Iowa second, and Mi- chigan third in the output of crude gypsum.
 The quantity of raw gypsum ground and sold for land plaster amounted in 1914 to 52,945 short tons, valued at s97,716, as Compared with 54,S15 tons. valued at s95,953. reported in 1913. The quantity of raw gypsum sold for the manufacture Of paint and of Port land cement and for various other purposes amounted to 390,742 short tons. valued at $549OS3, as against 40S,321 short tons valued at $601, 113, sold for similar purposes in 1913.
 The total quantity of calcined gyp- sum sold in 1914 was 117,7S3 tons less than that sold in 1913 but the total value was $171,434 greater. Nearly 95 per cent of the domestic calcined gyp- sum marketed in the United States, or 1.565,937 tons, is used for use as wall plaster, Keene's cement, plaster of Paris and other uses. About 1,250,00O wall plaster.