HUTCHINS' IMPROVED CRANK INDICATOR. Improvement in Machinery for Making Pails New Lubricator. Substitute for Shoe Leather. Improvement in Ventilating Cars. Reaping by Machinery in England. A 0 PATENT OIL CUP FOR JOURNAL BOXES. Figure 1. Figure 2. Figure 3., scientific american, 1851-09-06
HUTCHINS' IMPROVED CRANK INDICATOR. Improvement in Machinery for Making Pails New Lubricator. Substitute for Shoe Leather. Improvement in Ventilating Cars. Reaping by Machinery in England. A 0 PATENT OIL CUP FOR JOURNAL BOXES. Figure 1. Figure 2. Figure 3., scientific american, 1851-09-06
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