=Colorado River Distances.= _Miles._ _Total_ _Miles._ Point Isabel (Gulf of California) to Yuma 175 Yuma to Castle Dome Landing 35 210 ” Ehrenberg 125 335 ” William’s Fork 214 424 ” Mojave Cañon 232 442 ” Aubrey 220 395 ” Chemchuevis Landing 240 405 ” Mojave 300 465 ” Hardyville 312 477 ” Cottonwood Island 342 507 ” Callville 402 567 ” Stone’s Ferry 465 640 =Local Distances in Pinal County.= Florence to Picket Post 25 Globe City to Pinal Creek 18 =Local Distances in Pima County.= Tucson to Arivipa Cañon (N. E.) 120 Tucson to Picacho Mine (W.) 75 * * * * * The famous Turquoise Mine is in New Mexico, near the Arizona line. It comprises two enormous open quarries, perhaps 200 feet in depth at the deepest point, and covering an area of several acres. They must have been produced with great labor, since there are no traces anywhere of the use of tools or gunpowder. Tradition refers these workings to a period of greater antiquity than the Spanish occupation, and declares them to have been executed by the Aztec inhabitants of the regions who preceded the present Indian races. Stone hammers have been found in these quarries, but no tools of any metal. The trachyte is seamed and fissured throughout, at small intervals, and in every direction; and there is no reason to doubt that hammers, wedges, and levers would be quite sufficient to remove the solid masses. The turquoise occurs fully in the fissures, in the form of narrow seams and plates, rarely or never exceeding the fraction of an inch in thickness. The majority of the seams now exposed show the impure green variety, which is worthless. The Pueblo Indians, like civilized people, value the light-blue turquoise only.