Contents. TERMS FOR THE SCIENTIFIC AMERICAN. The Scientific American Supplement Scientific American Export Edition. NO. 87 PARK ROW NEW YORK. THE SCIENTIFIC AMERICAN SUPPLEMENT No. 210 For the Week ending February 21 1880. MR. CONVERSE'S PATENT BILL. 'HOW STEEL HARDENS., 1880-02-21
Contents. TERMS FOR THE SCIENTIFIC AMERICAN. The Scientific American Supplement Scientific American Export Edition. NO. 87 PARK ROW NEW YORK. THE SCIENTIFIC AMERICAN SUPPLEMENT No. 210 For the Week ending February 21 1880. MR. CONVERSE'S PATENT BILL. 'HOW STEEL HARDENS., 1880-02-21
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