Monthly bulletin of the International Bureau of the American Republics, International Union of American Republics . ^August of this year. A development mill, which has ))een in opera-tion for some time, is handling 500 tons per month, worth $17 per amalgamation and cj^aniding 90 per cent of the values is lieingprocured. The success upon which this company is apparently just. Remains of old Arrastra at El Provenir. entering is largely due or attributable, first, to the ability and persist-ence bestowed upon the early development of the properties by R. Crespi, and, second, to the s
Monthly bulletin of the International Bureau of the American Republics, International Union of American Republics . ^August of this year. A development mill, which has ))een in opera-tion for some time, is handling 500 tons per month, worth $17 per amalgamation and cj^aniding 90 per cent of the values is lieingprocured. The success upon which this company is apparently just. Remains of old Arrastra at El Provenir. entering is largely due or attributable, first, to the ability and persist-ence bestowed upon the early development of the properties by R. Crespi, and, second, to the skill of Mr. C. H. Colburn, the presentengineer and manager. Boston Mines —This subsidiary compan}^ to the Aban-garez Gold Fields, Limited, is operating the Tres Amigos Mine, andis now erecting a 10-stamp heavy battery, with cyanide annex. A3-stamp prospecting mill has been at work for the past twelve monthson this property crushing ore averaging $30 per ton and extractingabout 60 per cent by amalgamation. Za-s Cañas Syndicate.—This corporation owns 27 properties, oneof which is a vein known as the Esperanza, which is 70 feet from wallBull. No. 4—02 4 1038 INTERNATIONAL BUREAU OF THE AMERICAN REPUBLICS. to wall and carries an average of $10 per ton. There are severalfeeders or gash veins running into the main ledge carrying highervalues. The ore is suitable f
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