During a period of twenty-six years (from January 1882 to December 1908) the greatest extremes that were recorded in the state by the United States Weather Bureau were 113° at El Paso in June 1883 and - 16° at Amarillo, Potter county, in the Panhandle, in February 1899; within the same period the extremes at Galveston ranged only from 98° to 8°.
The principal cities are San Antonio, Houston, Dallas, Galveston, Fort Worth, Austin, the capital, Waco, El Paso, Laredo, Denison and Sherman.
At Ciudad Juarez (adjoining El Paso, Texas), on the northern frontier, the elevation is 3600 ft., which shows a slope of only 42 ft.
In operation outside of Vera Cruz and military needs led to its immediate extension to Paso del Macho, at the foot of the sierras, about 35 m.
On the 17th of October 1909 President Taft and President Diaz exchanged visits at the frontier at El Paso, Texas.