And what better way to present the examples than a nice, neat table. Here you go:
Barclay Perkins primings in the 1920's | |||||||||||
date | year | beer | style | quarts/barrel | type | OG | FG | gravity points | addition to gravity | new OG | new FG |
20th May | 1924 | RNS Raggett | Stout | 3 | sweet | 1055.1 | 1019 | 112.5 | 3.13 | 1058.2 | 1022.1 |
20th May | 1924 | RNS BS Scotch | Stout | 4 | sweet | 1055.1 | 1019 | 150 | 4.17 | 1059.3 | 1023.2 |
23rd May | 1924 | PA Export | Pale Ale | 0 | 1059 | 1017 | 0 | 0.00 | 1059.0 | 1017.0 | |
26th May | 1924 | BS c | Stout | 3 | invert @ 1150 | 1066 | 1020.5 | 112.5 | 3.13 | 1069.1 | 1023.6 |
5th Jun | 1924 | IBS | Stout | 3 | invert @ 1140 | 1061 | 1022 | 112.5 | 3.13 | 1064.1 | 1025.1 |
23rd Aug | 1924 | KKK | Strong Ale | 0 | 1082 | 1028 | 0 | 0.00 | 1082.0 | 1028.0 | |
4th Sep | 1924 | KK bottling | Strong Ale | 0 | 1070.3 | 1023.5 | 0 | 0.00 | 1070.3 | 1023.5 | |
17th Dec | 1924 | IBS ex | Stout | 0 | 1103.4 | 1040 | 0 | 0.00 | 1103.4 | 1040.0 | |
25th Feb | 1925 | XLK bottling | Pale Ale | 0 | 1038.2 | 1007.5 | 0 | 0.00 | 1038.2 | 1007.5 | |
16th Feb | 1925 | BS ex | Stout | 0 | 1072.2 | 1025.5 | 0 | 0.00 | 1072.2 | 1025.5 | |
31st Aug | 1925 | BBS ex | Stout | 0 | 1079.7 | 1029.5 | 0 | 0.00 | 1079.7 | 1029.5 | |
22nd Sep | 1925 | OMS | Stout | 0 | 1050.9 | 1017.5 | 0 | 0.00 | 1050.9 | 1017.5 | |
11th May | 1926 | KK | Strong Ale | 0 | 1055.5 | 1015 | 0 | 0.00 | 1055.5 | 1015.0 | |
13th Dec | 1926 | X | Mild | 3 | 1042.9 | 1012 | 112.5 | 3.13 | 1046.0 | 1015.1 | |
13th Dec | 1926 | X Special Dark | Mild | 4 | 1041.5 | 1012.5 | 150 | 4.17 | 1045.7 | 1016.7 | |
13th Dec | 1926 | Ale 4d | Mild | 1 | 1028.7 | 1008 | 37.5 | 1.04 | 1029.7 | 1009.0 | |
14th Dec | 1926 | PA trade | Pale Ale | 0 | 1052.8 | 1019 | 0 | 0.00 | 1052.8 | 1019.0 | |
14th Dec | 1926 | XLK trade | Pale Ale | 0 | 1045.8 | 1013 | 0 | 0.00 | 1045.8 | 1013.0 | |
14th Dec | 1926 | XLK bottling | Pale Ale | 0 | 1037.6 | 1007 | 0 | 0.00 | 1037.6 | 1007.0 | |
21st Dec | 1927 | KK trade | Strong Ale | 2 | 1056.8 | 1015.5 | 75 | 2.08 | 1058.9 | 1017.6 | |
10th Mar | 1928 | BS | Stout | 5 | 1053.5 | 1020 | 187.5 | 5.21 | 1058.7 | 1025.2 | |
10th Mar | 1928 | TT | Porter | 6 | 1032.8 | 1012.5 | 225 | 6.25 | 1039.1 | 1018.8 | |
Source: Barclay Perkins brewing records held at the London Metropolitan archives |
As you can see, not all their beers were primed. Confirming the theory, the Mild Ales (X, X Special Dark and Ale 4d) were primed. The four Pale Ales weren't.
The picture with K Ales was more complicated. KKK and the bottled version of KK weren't primed. The Draught KK trade (which would have been sold as Burton) was. Fascinating stuff, Burton. It mixes some of the characterisctics af Pale Ale with some of Mild's.
Porter and Stout take that complexity a level further. BS and TT, draught Stout and draught Porter, are the two most heavily primed beers. I calcualte that the priming for TT would have raised it's gravity by more than six points, or almost 20%. The full-strength Russian Stout, IBS ex, wasn't primed, but the weaker version was. Of the many other Stouts, the weaker ones were primed, except for Oatmeal Stout (OMS). A bit confusing.
I'd thought that I didn't have that many logs with priming details. But digging around has unearthed a few more. Noakes in particular, used masses of sugar as "Headings". Doubtless you'll be reading about that in great detail very soon.
I think your "new FG" is wrong. That would be the SG after priming, but not an actual final gravity. After the priming sugar fermented out in the bottle, the SG would be even lower than the original FG since alcohol has a SG of 0.79.
ReplyDeleteYou could calculate that assuming that the priming sugar fermented out 100%. I leave that as an exercise for the reader.
Jeff, most of the primed beers were draught. Yes, the final FG would have been lower after conditioning in the cask. But that's true of all the FG's that come from brewing records. With the exception of bottled beers that were force carbonated. The beers would have been sold before all the sugar had fermented out.
ReplyDeleteThe only real FG's are the ones from the gravity books, which are samples taken in pubs. Except you don't know what had happened to the beer in the pub. I've seen cases where the OG didn't match the brewing records by a considerable margin.
Are we to assume that the mild ales would be sold as soon as they dropped bright, but the pale ales would be kept in the pub cellar long enough to carbonate without any priming? Is that the idea?
ReplyDeleteBarm, something like that.
ReplyDelete