File:1851 book on expo.jpg
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![File:1851 book on expo.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/4/45/1851_book_on_expo.jpg/796px-1851_book_on_expo.jpg?20110909132810)
Size of this preview: 796 × 599 pixels. Other resolutions: 319 × 240 pixels | 638 × 480 pixels | 1,020 × 768 pixels | 1,280 × 964 pixels | 2,592 × 1,952 pixels.
Original file (2,592 × 1,952 pixels, file size: 772 KB, MIME type: image/jpeg)