Scientific American Supplement, No. 717, September 28, 1889Various
Science
Scientific American Supplement, No. 717, September 28, 1889
Various
Science -- Periodicals
Dried wine grapes are prepared in a similar manner to raisins; that is
they are dried in the sun, but do not require the same care in
handling that are given to raisins. Wooden trays 2 x 3 are sometimes
used, but it is by no means necessary to go to the expense of
procuring trays, as it has been found that a good quality of coarse
brown paper will answer every purpose, and this, with care, may be
made to last two or three seasons. The drying was last season
principally done on the bare ground, but there is much loss by
shelling, as those dried are required to be turned; a pitchfork is
used for that purpose. Brown building paper can be procured of city
paper dealers in large rolls at four and a half cents per pound;
according to the thickness, it will cost from one and three-quarters
to three and a half cents per square yard. A thin, tough, waterproof
paper is also made in rolls at about six cents a square yard. Wine
grapes dry in from ten days to three weeks, according to variety and
weather, and with the exception of Malvoisie, Rose of Peru, and Black
Hamburg, from three and a half to four and a half tons of the green
fruit are required to make one of the dried; these three varieties,
however, being large, meaty, and a firm pulp, do not require more than
from three to three and a half tons of the green fruit to produce one
ton of dried, and are, therefore, the most profitable for drying; they
also command better values in the market. The grapes are sufficiently
dried when, on being rolled between the thumb and finger, no moisture
exudes, and also when the stems are found to be dry and brittle, so
that they can be separated readily from the berries. After the grapes
have reached the proper state of dryness, they are taken in boxes or
sacks to the packing house, where they are stemmed and cleaned, after
which they are packed in white cotton sacks, holding from fifty to
seventy-five pounds each, and when marked are ready for shipment.
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