variegated copper, and veins of magnetic and specular iron. The annexed tabular statement will give the principal facts obtained with regard to the mines examined in Northern Mexico. TABULAR STATEMENT, SHOWING THE POSITION AND CHARACTER OF THE PRINCIPAL MINES OF NORTHERN MEXICO. BY A. RÉMOND.—1863-1865. ================+===================+=====================+=========+ Mines. | Location. | Country. | Strike. | ----------------+-------------------+---------------------+---------+ NAGHUILA |Near San Javier |Labrador porphyry |N. 35° W.| EUREKA |Bet. S. Miguelito |Greenstone |N. 45° W.| | & Los Bronces | | | PLEITEADA |Near San Javier |Labrador porphyry |N. 30° W.| SAN JUAN |Near San Javier |Quartzite (triassic) |N. 65° E.| CEBALLOS |Near Los Bronces |Labrador porphyry |N. 25° E.| HIGUERA |Near Los Bronces |Greenstone |N. 5° E.| LA BLANCA |Near San Antonio |Q’tzite and conglom’e|N. and S.| | de la Huerta | (triassic) | | SAN LUIS |Near San Antonio |Quartzite (triassic) |N. 40° W.| | de la Huerta | | | SANTA BARBARA |Near Corral Viejo |Quartzite |N.E.-S.W.| LA SIERRA |Near San Javier |Labrador porphyry |N. 60° E.| SAN JOSÉ |Near Los Bronces |Labrador porphyry |N. 27° E.| EL SECORRO |Near Los Bronces |Labrador porphyry |N. 25° E.| ZARAGOZA |Near Los Bronces |Labrador porphyry |N. 23° E.| SAN LUIS GONZAGA|Near San Javier |Labrador porphyry |N. 30° W.| LA COLORADA |Near Los Bronces |Altered sandst. & |N. 50° E.| | | slate (triassic) | | AGUAJITO |Near San Javier |Labrador porphyry |N. 24° E.| SANTA EDUBIGEN |La Barranca |Quartzite (triassic) |N.E.-S.W.| LA CUADRA |Near San Javier |Labrador porphyry |N. 10° W.| EL ROSARIO |Near San Javier |Labrador porphyry |N. 10° W.| EL ESCRITORIO |Near San Javier |Labrador porphyry |N.W.-S.E.| SANTA ROSA |Bet. Los Bronces |Quartzite (triassic) |N. 10° E.| | and San Javier | | | SOLEDAD |Candelero |Porphyry (metam.) |N. 55° E.| CARMEN |Candelero |Porphyry (metam.) |N. 85° E.| ATOCHA |Candelero |Porphyry (metam.) |N. 45° E.| ROSARIO |Candelero |Porphyry (metam.) |N. 50° E.| CONTRESTACA |Near La Puerta |Metamorphic rocks |N. 63° E.| DESCUBRIDORA |Near La Puerta |Metamorphic rocks |N. 35° E.| SOLEDAD |Bet. La Puerta and |Metamorphic rocks |N. 65° E.|