. The cultivation of the native grape. Viticulture; Wine and wine making. 152 MANUFACTURE OF. of the ammonical fluid, it will change into violet. This tinge indicates the saturation of the acids ; and the height of the fluid in the tube now shows the quantity of acid in the must, by whole, half and fourth parts per cent. The lines marked 1,2, 3, 4, indicate whole per cents.; the short intermediate lines, one-fourth per ; When Dr. Gall, shortly before the vint- age of 1850, first publicly recommended the dilution of the acids, he Avas obliged to refer to this instrument, as already k
. The cultivation of the native grape. Viticulture; Wine and wine making. 152 MANUFACTURE OF. of the ammonical fluid, it will change into violet. This tinge indicates the saturation of the acids ; and the height of the fluid in the tube now shows the quantity of acid in the must, by whole, half and fourth parts per cent. The lines marked 1,2, 3, 4, indicate whole per cents.; the short intermediate lines, one-fourth per ; When Dr. Gall, shortly before the vint- age of 1850, first publicly recommended the dilution of the acids, he Avas obliged to refer to this instrument, as already known, and everywhere at hand, which was at the same time cheap, and simple in its use. "It is true, however, that if must is examined by this instrument, the quantity of acids con- tained in it, is really somewhat larger than indicated by the instrument; because the acids contained in the must require for their saturation a weaker solution of am- monia than acetic acid. As however. Otto's acidimeter shows about one-eighth of the acids less than the must actually contains, and about as much acids combined with earths is removed during fermentation, Dr. Gall recommends that the quantity of acids be reduced to 6^, or at most 7 thousandths of Otto's acidimeter, and the results have shown that this was about the right proportion; as the wines in which the acids were thus diluted were in fivor with all consumers. ^' The acidimeter referred to was afterwards imjDroved, by making the tube longer and more narrow, and divid- ing it into tenths of per cents, instead of fourths; thus dividing the whole above 0 into thousandths. But although by this improved acidimeter the quantity of Fig. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Husmann, George, 1827-1902. [from old catalog]. New York, G. E. & F. W.
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