A WEEKLY JOURNAL OF PRACTICAL INFORMATION ART SCIENCE MECHANICS CHEMISTRY AND MANUFACTURES. Vol. Improved Time Register for Velocipedes Etc COURVOISIER'S TIME REGISTER. Improvement in Mill Bushes. CUSTER'S IMPROVED MILL BUSHES. Steel Springs. Fiy. 1, scientific american, 1869-11-06


A WEEKLY JOURNAL OF PRACTICAL INFORMATION ART SCIENCE MECHANICS CHEMISTRY AND MANUFACTURES. Vol. Improved Time Register for Velocipedes Etc COURVOISIER'S TIME REGISTER. Improvement in Mill Bushes. CUSTER'S IMPROVED MILL BUSHES. Steel Springs. Fiy. 1, scientific american, 1869-11-06


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