The pulp
then remaining has still further use. It is sold for treatment in
factories by the sulphide of carbon process, and by this method yields
from seven to nine per cent. of oil, of course suitable only for
manufacturing purposes. Only the first two pressings yield oil which
ranks as first quality, subject of course to the condition of the
fruit being unexceptionable. New oil is allowed to rest a while in
order to get rid of sediment; it is then clarified by passing through
clean cotton wool, when it is fit for use.
The highest quality of olive oil for eating purposes should not only
be free from the least taint in taste or smell, but possessed of a
delicate, appetizing flavor. When so many favorable conditions are
needed as to growth, maturity, and soundness of the fruit, coupled
with great attention during the process of oil-making, it is not to be
wondered at that by no means all or even the greater part of the oil
produced in the most favored districts of Tuscany is of the highest
quality. On the contrary, the bulk is inferior and defective.
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