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CONCENTRATING APPARATUS FOR SULPHURIC ACID BALANCE GATE FOR FLUMES IN WATER POWER—D. MACHINERY FOR FELTING HAT BODIES—Joseph HULLING AND SCOURING GRAIN SEED &COliver RE-ISSUES. ADDITIONAL IMPROVEMENT. PROTECTING BULWARK FOR WAR AE5SEL5—W. DESIGNS. Mine of Alum., scientific american, 56-07-12
CONCENTRATING APPARATUS FOR SULPHURIC ACID BALANCE GATE FOR FLUMES IN WATER POWER—D. MACHINERY FOR FELTING HAT BODIES—Joseph HULLING AND SCOURING GRAIN SEED &COliver RE-ISSUES. ADDITIONAL IMPROVEMENT. PROTECTING BULWARK FOR WAR AE5SEL5—W. DESIGNS. Mine of Alum., scientific american, 56-07-12
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