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136 Park. Such an aggregation of mechanical productions was unknown until it was presented in Birmingham, as a kind of outside illustration of the arts and sciences discussed in the British Association which met that year in the town. It was a display on such a large scale of what the Midland District and its metropolis could do, and embraced such a number and variety of specimens, that the most original feature of the Exhibition of 1851 was the building and not its contents.