Contents : PROGRESS IN MECHANICAL AND ENGINEERING SCI ENCE AND INVENTION IN 1869. NATURE OF DESIGN PATENTS. THE CARELESS USE OF LUCIFER MATCHES., scientific american, 1870-01-22


Contents : PROGRESS IN MECHANICAL AND ENGINEERING SCI ENCE AND INVENTION IN 1869. NATURE OF DESIGN PATENTS. THE CARELESS USE OF LUCIFER MATCHES., scientific american, 1870-01-22


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