In facsimile, a frequency modulationsystem where one frequency represents picture black and another frequency represents picture white[?]. Frequencies between these two limits may represent shades of gray
An intentional frequency change used for modulation purposes
... life to ministering to the sufferers of Hansen's disease (leprosy) who lived on the island of Molokai, Hawaii.
He was born in Tremeloo, Belgium, the son of a farmer. He ...