Intermittent evaporation process

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“In this mode of evaporating a variety of plans and arrangements for connivence are employed. The pans are made in the form of a shallow box, with a common sheet-iron, galvanized iron, or copper bottom, frequently with flaring sides or shores, on which the scum collects and remains until removed at the convenience of the operator. These pans are frequently made with partitions, which divide them into two or more compartments, into which the juice, as it becomes defecated and partly concentrated in one, is successively transferred to the next.” -Commissioner, 1865

Source

Commissioner of Agriculture Report of the Commissioner of Agriculture for the year 1864 (Washington D.C.: Government printing office, 1865) 80

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