I got into a routine of always photographing one document which wasn't a brewing book on every visit. Which is why I have pictures of something called "Brewing notebook A-H", A.H. presumably being the initials of a brewer.
It's packed with all sorts of handy stuff: the control prices of barley in WW II, Bass wholesale prices in 1920, the cost price of BBS Export from 1912 to 1919, barrels brewed 1913 to 1955, coal usage 1905 to 1955, brewing materials used 1920 to 1945, quantity of finings per beer in 1921, the price paid for spent grains 1902 to 1952 and much more.
I was having a look through it yesterday in the hope of finding details of the configuration of the brew house. To be specific, the number of mash tuns and coppers they had. I wanted to see how bad the bomb damage was in September 1940, when the brew house took a couple of hits.
I didn't find that, buy I did come across this very useful table , which shows the gravities of all their beers, plus details of the primings and their effect.
|Barclay Perkins Gravities in November 1922|
|Price||minimum Regulation Gravity||Mark||Brewed Gravity||Sweet added||Original Gravity Actual||Declared Gravity||Original Gravity according to Declared Gravities|
|5d||1027||Ale 5d||1030.2||1 qrt @ 1130||1030.8||1029||1029.6|
|6d||1033||TT||1034.2||6 qrts @ 1130||1038.1||1033||1037|
|7d||1039||X||1041.4||3 qrts @ 1130||1044||1041||1042.83|
|8d||1046||L.S.||1047.2||3 qrts @ 1130||1048||1046||1047.7|
|8d||1046||O.M.S.||1051.2||3 qrts @ 1130||1052.8||1050||1051.6|
|9d||1054||B.S. (T)||1055.2||4 qrts @ 1130||1957.2||1054||1056|
|9d||1054||R.N.S.||1055.2||3 qrts @ 1130||1056.7||1054||1055.5|
|9d||1054||K.K.||1055.2||1 qrt @ 1130||1044.7||1054||1054.5|
|9d||1054||IBS||1061.2||3 qrts @ 1130||1062.6||1060||1061.4|
|9d||1054||Lager Sp Dark||1058.2||NIL||1058.2||1057||1057|
|Export||B.S.c||1066.2||3 qrts @ 1150||1067.9||1065||1066.7|
|Export||XMAS B.S.c||1076.2||3 qrts @ 1150||1077.5||1075||1976.5|
|Brewing notebook A-H held at the London Metropolitan Archives, document number ACC/2305/1/711/1.|
In case you're wondering, "minimum Regulation Gravity" refers to the last set if price controls, where beer retailing for a certain price had to fit into a gravity band. For some beers, the primings significantly increased the OG, For example, TT (Porter), which by almost 4º.
The table also told me that Barclay Perkins breed a Christmas version of Best Stout. Never stumbled across that in the brewing records.