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Spasm of m. corrugator supercilii under very strong light (left); A relaxed face (photographed in full sunshine) (right)
Guillaume Duchenne de Boulogne (1806–1875)
photograph in the National Gallery of Art (NGA 169270)
- Date1854
- Mediumalbumen print
- Dimensions22.9 × 16.9 cm
- On display atGalería Nacional de Arte
Washington D. C., Estados Unidos