Mary Elizabeth Hallock-Greenewalt (1871-1950), a renowned inventor and pianist, made substantial contributions to music and technology. Her most notable creation is Nourathar, a unique art form using environmental color fields…
Mary Elizabeth Hallock-Greenewalt (1871-1950), a renowned inventor and pianist, made substantial contributions to music and technology. Her most notable creation is Nourathar, a unique art form using environmental color fields…