NOVEMBER 17 1894. TWO ARM DERRICK—CHICAGO DRAINAGE CANAL. The Highest Bridge. PORTABLE STONE DRESSING MACHINE OF THE AMERICAN PNEUMATIC TOOL COMPANY. A New Emerald Hine. Lick Observatory. PORTABLE STONE DRESSING MACHINE OF THE AMERICAN PNEUMATIC TOOL COMPANY., scientific american, 1894-11-17
NOVEMBER 17 1894. TWO ARM DERRICK—CHICAGO DRAINAGE CANAL. The Highest Bridge. PORTABLE STONE DRESSING MACHINE OF THE AMERICAN PNEUMATIC TOOL COMPANY. A New Emerald Hine. Lick Observatory. PORTABLE STONE DRESSING MACHINE OF THE AMERICAN PNEUMATIC TOOL COMPANY., scientific american, 1894-11-17
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