- (23 × 1.0969) - (10 × 1.0401)
- ———————————— = 0.284 of a gallon.
- (60 × 1.2899) - (23 × 1.0969)
Therefore, for every gallon of the must, we add 0.284 gallons of the syrup.
The same rule will apply to the mixing of a strong and a weak must.
Rules for Fortifying and Reducing Wines and Weak Liquors.—In mixing strong spirits, it is necessary to make an allowance for contraction, and tables are prepared for the purpose, but in mixing wines and weak spirits, it may be disregarded, and the following rules will be found sufficient.
To Reduce with Water.—Having a wine or a weak spirit of a certain per cent. of alcohol, how much water is required for each gallon to reduce it to any lower per cent.?
Divide the difference between the given per cent. and the required per cent., by the required per cent.
Suppose a wine or other alcoholic solution of 15 per cent. by volume, how much water is required for each gallon to produce one of 10 per cent.?
- 15 - 10
- ——— = ½
- 10
Therefore, add one-half gallon of water for each gallon of the wine or weak spirit.
To Reduce with Weaker Wine, or to Fortify with Stronger Wine or Alcohol.—Having two wines or other weak liquors whose percentages of alcohol are known, how much of the second is required for every gallon of the first, to produce a wine of any required strength between the two?