File:Gaston Portevin.jpg
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![File:Gaston Portevin.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/2/2d/Gaston_Portevin.jpg/403px-Gaston_Portevin.jpg?20190703094310)
Size of this preview: 403 × 599 pixels. Other resolutions: 161 × 240 pixels | 323 × 480 pixels | 517 × 768 pixels | 689 × 1,024 pixels | 1,830 × 2,719 pixels.
Original file (1,830 × 2,719 pixels, file size: 1.88 MB, MIME type: image/jpeg)