For 10 points, name this American realist painter of The Gross Clinic.  
A conductor's baton can be seen in the bottom left of a painting by him showing the title musician giving a recital, Concert Singer. One of this painter's students created an Annunciation scene in which Mary is sitting a modern-looking hovel and the Archangel is a vertical stream of light. A nude woman poses as a water nymph for the title wood sculptor in a painting by him of William Rush. In another painting by this teacher of Henry Tanner, Sweetbriar mansion can be seen to the right of the title figure, who rows along the Schuylkill river. This painter of Max Schmitt in a Single Scull is most famous for a painting of a grizzled gray-hair professor standing near a surgery demonstration for Jefferson Medical College. For 10 points, name this American realist painter of The Gross Clinic.  
A conductor's baton can be seen in the bottom left of a painting by him showing the title musician giving a recital, Concert Singer.
Thomas Eakins