Show ASSAYERS ASSAY jERS ORE TESTING AND PROCESS WORKS R rm H OFFICER CO C 0 ASSAYERS AND metallurgists 8 WEST TEMPLE STREET SALT LAKE CITY UTAH mill tests by concentration mill tests r asta by binim cyanide process mill tests rc aggs on cn copper ores by tham imelli mv method DONT TAKE CHANCES of finding out after you have erected an expensive mill that the method designed wont treat your ore OUR TECHNICAL department is kept up solely for the purpose of testing all kinds of ore and tailings and our record of results showing in almost every instance achievements on the large scale such as we had had predicted from our laboratory tests should satisfy the most exacting inquirer 1 we make a specialty of CYANIDE WORK and claim to have introduced the use of cyanide to this western country by the MACARTHUR MACARTHU R FOR FORREST REST PATENT METHODS many of the large low grade propositions in the west owe their success entirely to these processes our experts however are constantly devising improvements the latest being a method for overcoming the difficulties which have hitherto prevented the successful handling of ores containing copper and also a method for the profitable handling of silver ores by cyanide 5 the cold and silver extraction company of america p ltd TESTING WORKS 1716 BLAKE STREET BUILDING DENVER CHAS BUTTERS CO limited f E S LEAVER manager OR works chemical and metals metal lurg surgical ical laboratory DOOLY BLOCK SALT LAKE CITY UTA UTAH m i v n i J f v srm A 44 PNEUMATIC CYANIDE PROCESS SS Wa patented tented in U 8 so african airlean Re republic publio new zealand victoria new so wales so australia will do in 7 hours what requires require s from a 2 to 6 days by older methods SEND FOR PAMPHLET THE NATIO PROC PROCESS E SS 10 CO 09 0 9 3 06 boston bd denver colo reliably Reli ablo gold lead d 9 50 60 0 J W C CURRIE U IR R fea assap sold old d and dinv inv silver Ur er 7 75 old A la 11 silver v or copper ar 15 0 samples by mail receive prompt pomp t A attention tte alo rich ores and bullion 1 11 bought 12 W THIRD SOUTH ST P r 0 BOX OGDEN ASSAY GO COO 1429 STREET SALT LAKE alty manufactured BY BV the western ReD cacal lIcal GO co DENVER COLO for laboratory use PURITY and fine chemical work lla A z ALSO commercial ACIDS I 1 I 1 fill |