umbers of THE SCIENTIFIC AMERICAN, Export When ordering copies, please to remit for the same easy terms. This system Contained in SCIENTIFIC subject. ever published. Edition, 50 cents To be had at this office and at all the works up to assay, and _ re- AMERICAN SUPPLEMENT 158. To be had at this… … “ o Address JOHN A. ROEBLING’S SONS, Manufactur- Address ae “Scientific American” is printed with CHAS. ers, Trenton, N. J., or 117 Liberty Street, ‘New York. | B, -PayneéSons Corning, N.Y. MUNN & CO, ENEU JOHNSON & CO.’S INK. Tenthand Lom- tate where you saw this. bard Sts., Philadelphia, and 50…
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