270 GRAPE CULTURE AND WINE-MAKING. 



of the recommended method of improving and increasing the wine. 

 As a main point, we have to bear in mind that we are obUged to 

 calculate or find out the weight of the must and the water, be- 

 cause we can not otherwise determine the quantity of sugar and 

 the acids. Let us now take, for instance, two kinds of must of 

 different quality as an illustration : 



The good one shall be composed of 262 pounds of sugar, 5.9 

 pounds of acids, and 732.1 pounds of water. The inferior one of 

 110 pounds of sugar, 9 pounds of acids, and 881 pounds of water. 



We have here a wide difference in the three main materials, the 

 latter must, compared to the former, containing too little sugar 

 and apparently too much water, also by far too large a quantity 

 of acids. In order to bring it up to the standard of the good must, 

 and to know how much sugar and other substances we have to 

 add, let us try to find out by a simple calculation : 



(a.) Query. — If in a good quality of must 5.9 pounds of acids 

 require 732.1 pounds of water, how much water need the 9 pounds 

 of acids of the inferior ? 



Answer. — 5.9 : 732.1 = 9 : 1116.76 ; or, leaving out the fraction, 

 1117 pounds. 



{b.) Query. — If a good must holds 262 pounds of sugar to 5.9 

 pounds of acids, how many pounds of sugar do the 9 pounds of 

 acids of the inferior require ? 



Answer. — 5.9 : 262 = 9 : 399.65 ; or, leaving out the fraction, 400 

 pounds. 



In order, therefore to be qualitatively equal to the good must, 

 the raw one must be composed of 



1117 lbs. Water, 400 lbs. Sugar, 9 \hs.Acids. 



It contains _881 " " 110 " " _9 " " 



Andmeds "236 " " 290 ~ 



Making an increase of 520 pounds to the must, or more than 52 

 per cent. 



A natural must of 72° Oechsle's Scale =16 per cent, of sugar, 

 and 5 per cent, of acids, may safely be considered the most proper 

 standard by which to regulate the main materials of the inferior 

 ones. Such a standard must has 

 160 pounds of sugar. 

 6 " acids. 

 835 " water. 

 lUOO pounds. 



