The mixing is usually effected in gigantic vats holding at times as many as 12,000 gallons each, and having fan-shaped appliances inside, which, on being worked by handles, insure a complete amalgamation of the wine. This process of marrying wine on a gigantic scale is technically known as making the _cuvée_. Usually four-fifths of wine obtained from black grapes, and now of a pale-pink hue, are tempered by one-fifth of the juice of white ones. It is necessary that the first should comprise a more or less powerful dash of the finer growths both of the Mountain of Reims and of the River; while, as regards the latter, one or other of the delicate vintages of the Côte d'Avize is essential to the perfect _cuvée_. The aim is to combine and develop the special qualities of the respective crus, body and vinosity being secured by the red vintages of Bouzy and Verzenay, softness and roundness by those of Ay and Dizy, and lightness, delicacy, and effervescence by the white growths of Avize and Cramant. The proportions are never absolute, but vary according to the manufacturer's style of wine and the taste of the countries which form his principal markets. In the opinion of some clever amalgamators, a blend comprising one-third of the vintages of Sillery, Verzenay, and Bouzy, one-third of those of Mareuil, Ay, and Dizy, and the remaining third composed of the produce of Pierry, Cramant, and Avize, constitutes the wine of Champagne _par excellence_. Others not less expert declare that a simple mixture of the Ay, Pierry, and Cramant vintages furnishes a perfect wine. As when this blending takes place the wine is only imperfectly fermented and exceedingly crude, the reader may imagine the delicacy and discrimination of palate requisite to judge of the flavour, finesse, and bouquet which the _cuvée_ is likely eventually to develop. These, however, are not the only matters to be considered. There is, above everything, the effervescence, which depends upon the quantity of carbonic acid gas the wine already contains, and the further quantity it is likely to develop, which depends upon the amount of its natural saccharine. After the bottling, if the gas be present in excess, there will be a shattering of bottles and a flooding of cellars; while, on the other hand, if there be a paucity, the corks will refuse to pop, and the wine to sparkle aright in the glass. The amount of saccharine in the _cuvée_ has therefore to be accurately ascertained by means of a glucometer; and should it fail to reach the required standard, as is the case at times when the season has been wet and cold and the vintage a poor one, the deficiency is made up by the addition of the purest sugar-candy. If, on the other hand, there be an excess of saccharine, the only thing to be done is to defer the final blending and bottling of the wine until the superfluous saccharine matter has been absorbed by fermentation in the cask. [Illustration]