BENHAM DISCS, also known as “Artificial Spectrum Tops” In the late 1800s, an amateur inventor (a journalist by trade) named Charles Benham (pronounced BEN-um) accidentally discovered that tops printed with black and - Benham - Document - PDFSEARCH.IO

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	BENHAM DISCS, also known as “Artificial Spectrum Tops” In the late 1800s, an amateur inventor (a journalist by trade) named Charles Benham (pronounced BEN-um) accidentally discovered that tops printed with black and Add to Reading List Document Date: 2014-07-19 12:29:07 Open Document File Size: 967,90 KB Share Result on Facebook

BENHAM DISCS, also known as “Artificial Spectrum Tops” In the late 1800s, an amateur inventor (a journalist by trade) named Charles Benham (pronounced BEN-um) accidentally discovered that tops printed with black and Add to Reading List