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Title: julius robert von mayer
Caption: Color enhanced portrait of Julius Robert von Mayer (1814-1878), German physician and physicist. He contributed to an understanding of thermodynamics and explained many physical phenomena by applying the principal of the conservation of energy.
Credit: Album / Science Source / Photo Researchers
Image size: 2287 × 3636 px | 23.8 MB
Print size: 19.4 × 30.8 cm | 900.4 × 1431.5 in (300 dpi)