File:Cymagraph Willis 1842.png
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![File:Cymagraph Willis 1842.png](https://upload.wikimedia.org/wikipedia/commons/thumb/8/84/Cymagraph_Willis_1842.png/800px-Cymagraph_Willis_1842.png?20210228115859)
Size of this preview: 800 × 535 pixels. Other resolutions: 320 × 214 pixels | 640 × 428 pixels | 1,024 × 685 pixels | 1,280 × 856 pixels | 2,560 × 1,711 pixels | 6,814 × 4,555 pixels.
Original file (6,814 × 4,555 pixels, file size: 47.14 MB, MIME type: image/png)