Iwill give one proof of the certainty of this rule, by setting down the state of this first mash from it. 15,18 212 ------- 3036 1518 3036 ------- A. 3218,16 Number of degrees of heat in 14,66 barrels of boiling water. 16,00 Barrels of water to first mash. 15,18 Barrels made to boil. ------ ,82 Barrel to cool in. 40 Heat of cold water. B. 32,80 Number of degrees of heat in 1,34 barrels of cold water. 15,18 Boiling water. ,82 Cold water. 6,32 Volume of grist. ------ C. 22,32 Barrels, volume of the whole mash. 6,32 Barrels, volume of the 11 quarters of malt. ,40 Heat of the grist. ------ 252,80 Number of degrees of heat in the grist. 32,80 B. 3218,16 A. ------- C. 22,32 ) 350376 (157 degrees of heat required in the 2232 first mash, as above. ------- 12717 11160 -------- 15576 15624 ----- So long as the mixture consists only of two quantities of different heat, as is always the case of the first mash, the preceding solution takes place. But in the second and other mashes, where three bodies are concerned, each of different heat, viz. the boiling water, the cold water, and the mash, are to be mixed, and brought to a determinate degree, the rule must be different; yet, like the former, it is the same with what is used in similar cases of allaying, when different metals are to be melted down into a compound of a certain standard, or different ingredients of different value to be blended, in order to make a mixture of a determinate price. What the different density of the metals, or the different value of the ingredients are, in these cases, the different degrees of heat of the boiling water, the grist, and the air, are in this. _Rule to ascertain the heat of the second mash, and of the subsequent ones._ Let the same letters stand for the things they signified before, and _d_ express the actual heat of the grist, then will ----- ----- x = c - b × m + c - d × n ------------------------- a - b or in plain terms, the heat required less (-) the heat of the air, multiplied (×) by the quantity of water used. The heat required less (-) the heat of the goods, multiplied (×) by the volume of the goods. Their sum (z) divided (÷) by the heat of boiling water, (212) less (-) the heat of the air. Will quote the quantity to be made to boil, or to be brought through (212) the remainder part of the whole liquor for the mash is consequently the quantity to be cooled in.