A slow cooker is a countertop steam cooking appliance that maintains a relatively low temperature compared to other cooking methods, for hours. This allows unattended cooking of pot roast, stew and other dishes.

Steam Feed Cooker and Evaporator

A slow cooker is a countertop steam cooking appliance that maintains a relatively low temperature compared…

"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…

"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

Intermittent evaporation process

"In this mode of evaporating a variety of plans and arrangements for connivence are employed. The pans…

"This term is applied indiscriminately to evaporators with steam-pipe, whether arranged in the form of a coil, or, as more commonly used, in a rectangular series, In some the steam is admitted through a main pipe, from which others lead off at right angles, terminating in a similar main, which receives and carries off the condensed water of all...Still another, and the most convenient plan, thought not without some objectives, consists in admitting the steam at one end of the coil allowing it to ass progressively through the whole, driving the condensed water, which it will do, though imperfectly, before it." -Commissioner, 1865

Steam-coil evaporator

"This term is applied indiscriminately to evaporators with steam-pipe, whether arranged in the form…