"Santo Domingo" mine. Caracoles, Antofagasta. No. 2336-Silver ore. "Rosario" mine, Luca, Copiapó, Atacama, E.B. "Japonesa" mine, Copiapó, Atacama. No. 2340-Silver ore. At the foot of the mountains in Taltal, Antofagasta. No. 2341-Gold-bearing pyrites. Petorca, Aconcagua. No. 2343-Cinnabar (mercuric sulphide). "Chepon Nuevo" mine, "Pintados " mine, Tarapacá. from Antofagasta and 14 miles from the coast. Depth from 50 to 75 No. 2345-Argentite and silver chloride in limestone and barite. mine, Caracoles, Antofagasta. No. 2346-Tailings of the amalgamation of silver ores. Copiapó. SOCIEDAD MINERA ARTURO PRAT. "Casilda" Valparaiso. This company possesses various mines in the mineral district of Cachinal, Taltal, Antofagasta, that have been worked on a productive scale for more than 20 years. The ores are reduced in a plant owned by the same company in the harbor of Taltal, doing the amalgamation by the Kröncke process. The veins have yielded more than 300,000 kilograms of silver, The average content in silver has been from 64 to 80 ounces per ton. No. 2347-Silver ore (224 ounces silver per ton). "San Victor" mine, Cachinal, No. 2348-Silver ore. Depth 200 metres; 160 ounces silver per ton. RODRIGUEZ, José Manuel. Los Andes. No. 2354-Mispickel and antimony ore. "Chile" mine, Los Andes, Aconcagua. SOCIEDAD MINERA DE CHALLACOLLO. Iquique. This company possesses very abundant silver and lead ores which are reduced by the Russell process of lexiviation with hyposulphide of soda. The only plant in the country that employs this process for the recovering of silver. Dissolved silver is precipitated by sodium sulphide, and the resulting sulphide of silver, containing from 25 to 30 per cent. silver, and from 2 to 7 per cent. gold, is shipped to Europe. The quantity of silver produced is 5,000 kilograms per year, the average grade of the ore being from 1 to 12 per cent. of silver. The works on the mine and the recovering plant are very well conducted, and the future of this company appears to be a splendid one. The ore yields by this process from 85 to 90 per cent. of the silver contained. No. 2355-Silver and lead ore. "Buena Esperanza" mine, Challacollo, Iquique. No. 2356-Silver iodide and galena. "Buena Esperanza" mine, Challacollo, Iquique. No. 2357-Samples of silver ore showing the different kinds of ores found in the "Buena Esperanza" mine, Challacollo, Iquique. No. 2358-Silver sulphide obtained by precipitation from solutions in the Russell process (60 per cent. silver). This product is shipped to Europe. Annual production 5,000 kilograms of fine silver. ESCOBAR & BROWN. Copiapó. No. 2359-Silver ore (16 ounces per ton). Depth 40 metres. "Al fin hallada mine, Tres Puntas, Copiapó. No. 2360-Limestone of the Jurassic formation in which the veins are found. SUCESION MATTA. Copiapó. No. 2361-Silver ore (12 ounces per ton). Depth 35 metres. "Buena Esperanza,” mine, Chimbero, Copiapó, Atacama. TORO, Santiago and Alberto. Copiapó. This mine is one of the few that yields a fair amount of silver in this mineral district of Punta Brava, a district which is worth the investment of capital to work and develop the old closed down mines from which very rich ores were extracted without providing the mines with the necessary supplies for keeping the workings going. No. 2362-Silver ore. "Pepa" mine, Punta Brava, Copiapó. DEVESCOVI, J. & CO. No. 2363-Silver-bearing galena. "San Felix " mine, Yabricoya, Tarapacá. SOCIEDAD MINERA DE BORDOS. Although this mine was discovered in 1857, only some secondary veins were worked in a primitive manner. These veins yielded a large amount of natural amalgam. In 1880, Señores Garcia and Echeverría Blanco began developing the mine by working the big vein which forms the contact between the country rock (porphyry) and a large layer called the "Manto Cantera." They developed the mine to a very fine state and later introduced hoisting engines, air compressors, steam engines and a long inclined double gauge plan for the transportation of ores from the mine to the ground. With all these improvements this mine must be considered as one of the best worked in our country, and reflects credit on their owners. Ores that are found in bodies of more than 2 metres wide, and recognized throughout a horizontal extension of 800 metres, are principally formed by clay in the shape of small layers, between which the chlorobromide of silver is the most frequent mineralogical specimen that appears in the mine. Often in the joints of the layers native silver in the form of thin sheets, silver sulphide and silver iodide is found. The depth of the mine, measured by the inclination of the principal pit, is 650 metres. The average grade of the ore is from 18 to 20 ounces silver per ton. The produc The total production having a value of $5,762,380, and the profit as stated in the above figures. The following samples represent the different kinds of rocks found in the mine, and the different kinds of ores, according to the vertical section of the plan of the mine exhibited. No. 2365-Thirty-three samples of all kinds of rocks near the vein, as well as of No. 2366-Six samples of different kinds of ores. Details can be found on the No. 2367-Tailings obtained in the milling of the ores above mentioned. COMPANIA DE LEXIVIACION DE MINERALES DE PLATA. Iquique. GROUP 60-NON-METALLIC MINERAL PRODUCTS. JERIA, Arnaldo. Santiago. No. 2369-Substitute of garnet, etc., for polishing purposes. PUELMA TUPPER, Francisco. Santiago. No. 2370-Diatomite. "Kieselguhr," Negrete, Mulchen. CLASS 210-Limestone, Cement and Artificial Stone-Methods and Processes. COMMISSION OF CHILE. Santiago. No. 2371-Limestone. Very abundant deposits near Pueblo Hundido, Chañaral, VILLARROEL, Arturo. Santiago. No. 2372-Limestone. Tiltil. Very abundant deposits of this calcite. Used as MORANDÉ, Salvador. Santiago. No. 2375-Artificial stone used for floors. MAURER Y GEIGER. Calera. No. 2376-Portland cement. COUSIÑO, Carlos. Santiago. No. 2377-Portland cement. Calera. CLASS 211-Graphite and its Products. COMMISSION OF CHILE. Santiago. No. 2378-Graphite. Chehueque. Near Vallenar, Atacama. CLASS 212-Clays and other Fictile Materials and their Direct Products. RAMIREZ, Ramon, & OYARZO, Camilo. Iquique. No. 2379-Kaoline sample. Near Iquique. No. 2380-Fine kaoline sample. Near Iquique. No. 2381-Sapolio, manufactured with the koaline mentioned above. VILLARROEL, Arturo. Santiago. No. 2382-Common kaoline. Tiltil, Santiago. No. 2383-Selected kaoline. Tiltil, Santiago. No. 2384-First-class selected kaoline. Tiltil, Santiago. COMPAÑIA EXPLOTADORA DE LOTA Y CORONEL. Valparaiso. This company owns two plants near the coal mine for the manufacture of bricks, pipes, flowerpots, statues, etc., made of ordinary clay and fire-clay extracted from the coal mines together with the coal. More than 150 workmen are occupied in these two plants. No. 2385-Fire-clay from a layer near the coal seams. Used for fire-bricks, sewer pipes, flower-pots, etc. Annual production, 4,520 tons. No. 2386-Fire-clay worked and prepared for manufacture. No. 2387-Quartz used for the manufacture of fire-bricks. No. 2388-Mixture of fire-clay and quartz showing the composition of fire-bricks. No. 2390-Fire-bricks for furnace bottoms. No. 2391-Flower jar with pedestal. No. 2392-Flower jars with pedestals, Nos. 4, 5, 9, 10, 11, 12, 17. No. 2393-Large flower-pot in the shape of a tree-trunk and branches. No. 2394-Two pedestals for statues or jars. No. 2395-Fourteen different sizes sewer pipes, from 8 to 40 metres diameter. No. 2396-Overflow pipe, 10 metres diameter. No. 3397-Joint of 15 metres diameter. No. 2398-Small statue holding light. No. 2399-Fire-bricks, six different shapes and sizes. No. 2400-Different kinds of bricks. No. 2401-Bricks for flooring. No. 2402-Pedestal for small statue. CLASS 213-Salts, Sulphur, Pigments and Miscellaneous Useful Minerals COMMISSION OF CHILE. Santiago. No. 2403-Natural sulphur. Taltal, Antofagasta. No. 2405-Natural sulphur. Choquenanta, Tarapacá. Worked and used without No. 2407-Natural sulphur. Maricunga, Copiapó, Atacama. No. 2408-Gypsum. Vetana, Coquimbo. No. 2409-Gypsum. "Matilde" mine, Elqui, Coquimbo. Pocopoconi, Tarapacá. No. 2415-Colemanite (borate of lime, 26 per cent. boric acid). Dioloque, Puna No. 2416-Colemanite (borate of lime). Surire, Tarapacá. No. 2417-Ulexite (borate of soda and lime). Ascotan, Tarapacá. 34 per cent. No. 2418-Calcinated ulexite (42 per cent. boric acid). Ascotan, Antofagasta. No. 2420-Pickeringite (magnesia alum). Pintados, Iquique, Tarapacá. No. 2421-Tamaruguite (soda alum). No. 2422-Mirabilite (Glauber salt). Tarapacá. Pintados, Tarapacá. Sulphate of sodium. Pampa, Cumillalla, No. 2423-Pickeringite (magnesia alum). Tarapacá. No. 2424-Blödite (sulphate of magnesia and soda). Pintados, Tarapacá. No. 2425-Potassium chloride (16 per cent. chloride). Bellavista, Iquique, Tara pacá. No. 2426-Pickeringite (magnesia alum). Pintados, Tarapacá. No. 2428-Soda and iron oxide cromate. Pintados, Tarapacá. No. 2430-Common salt. No. 2431-Natural sulphur. Sillajualla, Tarapacá. Very abundant deposits that |