The Ores of Gold and Silver.
| NAME. | COMPOSITION. |
| Native gold | Gold; silver up to 40 per cent.; copper and iron. |
| Quicksilver | Mercury, with sometimes a little silver. |
| Amalgam | Silver, 26 to 35; mercury, 74 to 65. |
| Arquerite | Silver, 87; mercury, 13. |
| Gold Amalgam | Mercury, 58 to 61; silver, 0 to 5; gold, 38 to 42. |
| Native silver | Silver, alloyed with other metals. |
| Bismuth | Bismuth, 27; lead, 33; silver, 15; iron, 4; copper, 1; sulphur, 16. |
| Native copper | Pure copper, with small quantity of silver through it. |
| Tellurium | Tellurium, with gold and iron, varying quantities. |
| Antimony | Antimony, containing at times silver, iron, or arsenic. |
| Discrasite | Antimony, 23; silver, 77. |
| Silver glance | Sulphur, 13; silver, 87. |
| Naumannite | Selenium, 27; silver, 73. |
| Eucairite | Selenium, 32; copper, 25; silver, 43. |
| Hessite | Tellurium, 37; silver, 63. |
| Stromeyrite | Sulphur, 16; silver, 53; copper, 31. |
| Sylvanite | Tellurium, 56; gold, 28; silver, 16. |
| Nagyagite | Tellurium, 13 to 32; lead, 51 to 61; gold, 6 to 9. |
| Sternbergite | Sulphur, 34; silver, 32; iron, 34. |
| Miargyrite | Sulphur, 21; antimony, 43; silver, 36. |
| Pyrargyrite, or ruby silver | Sulphur, 18; antimony, 23; silver, 59. |
| Proustite, or ruby silver | Sulphur, 20; arsenic, 15; silver, 65. |
| Freieslebenite | Sulphur, 19; antimony, 27; lead, 30; silver, 24 |
| Tetrahedrite, or gray copper | Sulphur, arsenic, antimony, silver, copper, iron, zinc, and mercury, in most varying proportions. |
| Polybasite | Sulphur, 16; antimony, 13; silver, 71. |
| Stephanite | Sulphur, 16; antimony, 14; silver, 70. |
| Xanthocone | Sulphur, 21; arsenic, 15; silver, 64. |
| Fireblende | Sulphur, antimony, with silver, up to 62 per cent. |
| Cerargyrite, or horn silver | Chlorine, 25; silver, 75. |
| Embolite | Chlorine, 13; bromine, 20; silver, 67. |
| Megabromite | Chlorine, 9; bromine, 27; silver, 64. |
| Mikrobromite | Chlorine, 18; bromine, 12; silver, 70. |
| Bromyrite, or bromic silver | Bromine, 43: silver, 57. |
| Iodyrite, or iodic sliver | Iodine, 54; silver, 46. |
| Jalpaite | Copper and silver glance. |
| Acanthite | Sulphuret of silver. |
| Crookesite | Copper, thallium, silver, and selenium. |
Charles P. Stanton, geologist, writes to the Prescott “Miner,” under date of Nov. 9th, 1877, as follows: The great carboniferous basin of Arizona—and in all probability of the world—exists within 140 miles of Prescott. This immense coal deposit makes its first appearance in Southwestern Colorado and Northwestern New Mexico; but its great nucleus extends from Tierra Ausarilla, in Rio Arriba, New Mexico, to the Colorado River, a distance of 276 miles, and from the San Juan River, a distance of 138 miles. This immense area of 38,088 square miles is one continuous mass of coal. It lies between the parallels of 100 and 112 west longitude, and 35 and 37 north latitude, and all in Yavapai County.