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…
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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…