The engraving represents a vacuum pan much used in the French sugar refineries.
A great stride forward was made by Howard's invention of the vacuum pan.
However this may be, I cannot help believing that the vacuum pan has many decided advantages over all others.
This necessity will be less urgent if the liquor be made to boil before being introduced into the vacuum pan.
But when the vacuum pan was introduced the molasses was impoverished of its sweetness and beet sugar does not yield any molasses.
In the vacuum pan process tiny cubes of salt are formed and settle to the bottom of the pan in which a vacuum has been created.
The process of emptying the vacuum pan is technically called a "strike."