Transactions . stroke if the plunger ;i puff of air is forced up through the ore-cap, Meeting a clean and regular output of concentrates through he gates, n and />. The usual pressure in the receiver varies mm 25 to 85 Ids, Fig. 2.. Klein Jig, End Elevation. The eccentric can be regulated so as to give a throw of from) to 3 in., according to the class of ore to be treated. In>E. Missouri, where only galena-ore is concentrated, strokes of).625, 0.875 and 1.25 in. respectively, are employed for mate-•ial of 4, 7 and 12 mm. grain; the number of strokes per min-lte averaging about 150. At a

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Transactions . stroke if the plunger ;i puff of air is forced up through the ore-cap, Meeting a clean and regular output of concentrates through he gates, n and />. The usual pressure in the receiver varies mm 25 to 85 Ids, Fig. 2.. Klein Jig, End Elevation. The eccentric can be regulated so as to give a throw of from) to 3 in., according to the class of ore to be treated. In>E. Missouri, where only galena-ore is concentrated, strokes of).625, 0.875 and 1.25 in. respectively, are employed for mate-•ial of 4, 7 and 12 mm. grain; the number of strokes per min-lte averaging about 150. At a plant in SE. Missouri, 27 of these jigs, of 4 compart-nents each, are treating from 450 to 500 tons of lead-ore every24 hours. A test run of several weeks duration was made oni lot of 2.5 per cent, lead-ore which had been thrown aside * In Fig. 1, the connections from x and s s to y—y are, unfortunately, not shown. 622 Till] KU:i .IKi AND NIK KLEIN CLASSIFIER.