Just posted lots of new images to the Mary Hallock Greenewalt Visibility Project from my latest dig into the amazing Mary Hallock Greenewalt archive at Historical Society of Pennsylvania. Lots of interesting things this time, including Mary’s proposed nomenclature for light color play scoring, her patent dispute with Thomas Wilfred, her research on earlier color organs and rheostats, and more. So I’ll break things down into a few different posts on the Mary Hallock Greenewalt Facebook page. As always, you can find everything in the Visibility Project indexed by tag.
Meanwhile, for starters..