The Portland Museum of Art will host a free online lecture, “Winslow Homer in the Laboratory: The Houghton Farm Watercolors, 1878,” on Saturday, August 1, from 10 to 11 a.m.

Judith C. Walsh, professor emerita at State University of New York at Buffalo, will present the talk as part of the museum’s Barnet Scholar’s Weekend.

In the summer of 1878, with his career stalled, Winslow Homer visited Houghton Farm, 50 miles north of New York City. The works he created at the farm indicate a change in his point of view and a change in method. Many, all in water-based paint, were experimental, and they mark his transformation from a strictly realist painter to a more lyrical naturalist.

To register, visit portlandmuseum.org.