Scientific American Supplement, No. 561, October 2, 1886 eBook

This eBook from the Gutenberg Project consists of approximately 141 pages of information about Scientific American Supplement, No. 561, October 2, 1886.

Scientific American Supplement, No. 561, October 2, 1886 eBook

This eBook from the Gutenberg Project consists of approximately 141 pages of information about Scientific American Supplement, No. 561, October 2, 1886.

Other workmen come with carts, pick it up, tie it in bundles and carry it to the mill.  The cutting of the cane is so adjusted as to keep pace with the action of the mill, so that both are always at work.  Two gangs of men are frequently employed, and work goes on far into the night during the season, which lasts the greater part of the year.

As before stated, some of the methods of manufacture are very simple.  In the simplest form, the sugar cane is crushed in a mortar.  The juice thus extracted is boiled in common open pans.  After boiling a certain length of time, it becomes a dark colored, soft, viscid mass.  The uncrystallized sirup is expressed by putting the whole into cloth bags and subjecting them to pressure.  This is molasses in a crude state.  It is further purified by reboiling it with an addition of an alkaline solution and a quantity of milk.  When this has continued until scum no longer arises, it is evaporated and then transferred to earthen jars.  After it has been left for a few days to granulate, holes in the bottom of the jars are unstopped, and the molasses drains off into vessels placed to receive it.  Another process of extracting molasses is as follows:  By various processes of boiling and straining, the juice is brought to a state where it is a soft mass of crystals, embedded in a thick, but uncrystallized, fluid.  The separation of this fluid is the next process, and is perfected in the curing house, so called.  This is a large building, with a cellar which forms the molasses reservoir.  Over this reservoir is an open framework of joists, upon which stands a number of empty potting casks.  Each of these has eight or ten holes bored through the bottom, and in each hole is placed the stalk of a plantain leaf.  The soft, concrete mass of sugar is removed from the cooling pans in which it has been brought from the boilers and placed in the casks.  The molasses then gradually drains from the crystallized portion into the reservoir below, percolating through the spongy plantain stalks.

On the larger plantations, machinery of very elaborate description is used, and the most advanced processes known to science are employed in the manufacture.  The principle is, however, the same as has been seen in the account of the simpler processes.  On these larger plantations there are extensive buildings, quarters for workmen, steam engines, and all the necessary adjuncts of advanced manufacturing science.  In the sugar mills the cut cane is carried in carts to the mill.  It is then thrown by hand upon an endless flexible conductor which carries the cane between heavy crushers.  The great jaws of the crushers press the cane into pulp, when it is thrown aside automatically to be carted away and used as a fertilizer.  The juice runs off in the channels of the conductor into huge pans.  The juice is now of a dull gray color and of a sweet, pleasant taste, and is known as guarapo.  It must be clarified at once,

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Scientific American Supplement, No. 561, October 2, 1886 from Project Gutenberg. Public domain.