Now since the heat of the first tap was 138 degrees, and my mash tun holds 20,25 gallons upon an inch, the following proportion may be deduced from the preceding table.
| If 8 | ———————7———————— 20,25 | |
| ———— | ||
| 8,00) 141,7500 | ||
| ———— | ||
| 17,71 | Gallons, |
and this is the true quantity contained in one inch, at a heat of 138 degrees.
The quantity of water used for the first mash, was 12B. 2F. 3G. or 428 gallons, of which one fifth is supposed to be steamed away, when the first liquor is gone through the whole process of the extraction: but as the gauges of the malt and water together are taken before the tap is set, in the beginning of the process, the whole evaporation ought not to be deduced, and one sixth seems to be a sufficient allowance on this account. We may therefore suppose 357 gallons to be in the mash tun at the time of gauging, which number being divided by 17,71, will shew how many inches are taken up by the water at that heat.
17,71)357,0000(20,15
3542
———
2800
1771
———
10290
8855
———
1435
| The mash gauged just before the tap was set, | 25,00 Inches. |
| Allowed for the space under false bottoms, | 0,66 |
| —— | |
| 25,66 | |
| Deduct the inches taken up by the water, | 20,15 |
| —— | |
| Remainder for the five quarters of malt, | 5,51 Inches. |
or 1,10 inch for one quarter. This number being multiplied by 17,71, the quantity of gallons contained upon one inch at this heat, will give 19,48 gallons for the volume of one quarter of this malt. There now remains nothing but to bring a barrel of water of 34 gallons, under like circumstances, as to expansion and evaporation, with these 19,48 gallons, with this difference only, that as the proportion required is, at the time the water and malt first come in contact, and not after the mash has been worked, a less allowance for steaming will be sufficient, and may well be fixed at one seventh.
| Gauge within the bills of mortality. | Gauge without the bills of mortality. | ||
| If 7,00 8,00 36 | If 7,00 8,00 34 | ||
| 36 | 34 | ||
| —— | —— | ||
| 4800 | 3200 | ||
| 2400 | 2400 | ||
| —— | —— | ||
| 7,00)288,00 | 7,00)272,00 | ||
| —— | —— | ||
| 41,14 | 38,85 | ||
| 5,87 | Lost by steam. | 5,55 | Lost by steam. |
| —— | —— | ||
| 35,24 | 33,30 | ||
The barrel of water reduced; and as 19,48 gallons, under the same circumstances, were found equal to one quarter of malt, the following division will shew the proportion, between them.
| 19,48)35,2400(1 81 | 19,48)33,3000(1,70 | ||
| 1948 | 1948 | ||
| ——— | ——— | ||
| 15700 | 13820 | ||
| 15584 | 13636 | ||
| ——— | ——— | ||
| 1760 | 184 | ||
| 1948 | |||
| ——— | |||