A NEW SAFETY VALVE. A CALIFORNIA VERDE ANTIQUE QUARRY. A NEW SAFETY VALVE. THE ROUND SCARS INDICATE THE PLACES FROM WHICH THE OLLAS WERE BROKEN BY THE INDIANS. SERPENTINE QUARRY AND MILL SANTA CATALINA ISLAND CAL., scientific american, 1899-12-16
A NEW SAFETY VALVE. A CALIFORNIA VERDE ANTIQUE QUARRY. A NEW SAFETY VALVE. THE ROUND SCARS INDICATE THE PLACES FROM WHICH THE OLLAS WERE BROKEN BY THE INDIANS. SERPENTINE QUARRY AND MILL SANTA CATALINA ISLAND CAL., scientific american, 1899-12-16
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