"Jacobs evaporator consists of a plain rectangular shallow pan of any convenient length and width, made with a sheet metal bottom and wooden sides. The side pieces are grooved or notched on the inner faces to receive thin board partitions or divisions, extending from side to side, and separating the pan into any convenient number of compartments. These partitions rest loosely upon the bottom, allowing the juice to flow under from one division to the other, while the scum which rises to the surface as the juice moves slowly along, is held back The division boards fit loosely in the grooves in the sides, and may be changed or removed at pleasure." -Commissioner, 1865

Jacobs Pan

"Jacobs evaporator consists of a plain rectangular shallow pan of any convenient length and width, made…

"The Harris pan has the same general form and construction as the foregoing, except that the partitions are made of metal and riveted to the bottom, with openings at short intervals for the under flow of juice fro one division or compartment to another. The furnace and the fire are so regulated that the juice boils through the entire length of the pan, and the sirup is brought off in a finished state, entering in a continuous stream as green juice, and being discharged continuously from the opposite end as sirup. The partitions being riveted to the bottom, serve to hold the thin metal of which the bottoms are usually composed even and level." -Commission, 1865

Harris pan

"The Harris pan has the same general form and construction as the foregoing, except that the partitions…