Ed Whitman wrote:Pendergrast mentions it briefly in Uncommon Grounds. One of the Hills Brothers, Reuben Wilmarth Hills adopted cup testing coffee in the 1880's originally pioneered by Clarence Bickford from San Francisco. Originally green coffee was purchased based on sight/ smell and cup testing evolved for greater accuracy. Supposedly the 7 gram coffee weight was the exact weight of a dime and nickel.
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