Arizona republican., 1909-02-25

reous beds alternate with highly si- liceous layers. These all weather white in color but have interiorly the peculiar drab or mouse colored tone characteristic of the Solenhofen stone. Experimental trials upon small samples compare in results favorably with those upon imported stone. The Arizona stone takes in well and is slightly absorbent, so that it is easily and uniformly wetted by the sponge
 POTTERY AND BRICK CLAY.
 Clays for fine pottery, or for the manufacture of brick and tile, are abundant and obtainable along and near the railway between Tucson and Benson.
 A good, strong, plastic clay con- taining carbon or graphite, and black in color, is obtained in quantity near the northern end of the Whetstone mountains in Cochise county, about seven miles from Benson. It contains diffused carbon and has been found very useful about the Copper Queen smelters at Bisbee. Farther details may be found in the report of the governor of Arizona, 1899.
 The alluvial clays of the Santa Cruz river at Tucson make a soft red-b brick and haxe been extensively utilized. --
 Black clay at Bridger's in the Chiri- cahuas appears to be a fair quality of fire clay and resembles that ob- tained near Benson.
 A good clay is reported from Col umbia. Yavapai county. eight miles from Hot Springs, Castle creek. (North, 1907)
 A superior shale, suitable for the manufacture of brick. has recently been discovered near Tucson, and is to be the basis of brick industry of large magnitude. Sharp. strong brick of various pleasing colors are readily made from this material.
 LIMESTONE.
 Limestones suitable for making lime for mortar are abundant and accessible at nearly all points where they are needed. Good lime is burned in the Tucson mountains a few miles west of Tucson. At Tempe, in the Salt River valley. a limestone is well adapted to hydraulic lime mortar Caliche makes a good, strong mortar If properly calcined and mixed with sand. The materials for the manu facture of cement are obtainable near Tucson and other points.
 MARBLE.
 Marble of fair quality is Quarried at many places in Arizona, and is utilized for monuments at the chief centers of population.
 A white marble is found in the foothills of the Chiricahua mountains near the old military post. Both to exist there in large deposits and of superior quality.
 White statuary marble occurs at the north end of the Catalina noun tains near the Condon copper prop erty. It is very white and has an even crystalline grain.
 Black and variegated marble exists near the Total Wreck mine, west of Tucson, but has not been explored
 A fair grade of black marble can be quarried in the Tucson mountains a few miles west of Tucson.
 Marble of various shades has been quarried at various places in the Santa Rita mountains along the wag on road leading from VaiPs station to the copper mines at Helvetia.
 MINERAL PAINT.
 See, also, Hematite, Ferric Iron oxide.
 Excellent native pigments consist Ing of hematite occur at several diff ferent localities. but particularly in Park mining district. eight miles from the Colorado river on the California side. but tributary to the Arizona town of Parker. It is that the quantity is large and that the place was worked by the aboriginal people with stone mauls, axes and other implements. and that there are extensive open ngs made by them.
 ONYX. See, also, Onyx Marble. Remarkably fine varieties of onyx marble are quarried at several places n Arizona, already enumerated. A variety remarkable for the regularity of the layers of different shades of color occurs near Clifton. as shown by specimen presented by M. F. Egan.
 -O- DF. Emmons fits and furnishes sias- res. 86s N. 4th avenue.