A WEEKLY JOURNAL OF PRACTICAL INFORMATION ART SCIENCE MECHANICS CHEMISTRY AND MANUFACTURES. $3 per Annum. Improved Revolving Blade Scroll Sawing Machine. Improved Carriage nab. MOORE'S REVOLVING BLADE SCROLL SAWING X O'CONNOR'S IMPROVED CARRIAGE HUB. Easy Method of Cutting Glass. Recovering Gold. ACHINE., scientific american, 1871-06-24

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