Search Only Images Download this image Portrait of Voltaire No info available for book source. Image ID: SIL-SIL14-v003-04 Supplied Caption: Portrait of Voltaire. Engraving. After Jean Antoine Houdon, 1741-1828. Tags: physics, Voltaire (1694-1778) Categories: Science Collection(s): Scientific Identity No Copyright - United States Request copy of image How can I use this image?