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20-02-2013, 09:16
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Yes, you guessed it. I'm continuing to be lazy. Putting Tetley's Stout under the microscope is even less effort than looking at their Porter.

Why's that? Because I'm struggling to find London Stout to compare it with. The Tetley's Stout is just too weak. It was rare for a London Stout to dip below 1070º. After a bit of searching I managed to find a set of Truman Stouts that aren't too different in gravity.

The hopping is the first thing to jump out. It's clear that Tetley dropped the hopping rate considerably after 1858. And that after this date is was much less heavily hopped than Truman's Stout. Both started at over 13 lbs per quarter, but Tetley dropped to 7.5 lbs. There was a reduction in the hopping rate at Truman, but to a much lesser degree, still being 11 lbs per quarter in the 1890's.

The degree of attenuation was mostly lower at Tetley, often below 60%. 65-70%, as at Truman, was more typical in London.

As most of the boil times are missing for Truman, I can't really say much about that. The one that there is, shows a generally similar pattern to the boils at Tetley.

I think there can be little doubt that Tetley's Stout would have tasted quite different to Truman's. We'll discover just how different next time when we look at the grists of these beers.




Tetley Stout 1858 - 1896


Year
Beer
Style
OG
FG
ABV
App. Atten-uation
lbs hops/ qtr
hops lb/brl
boil time (hours)
boil time (hours)
boil time (hours)
Pitch temp
max. fermen-tation temp
length of fermen-tation (days)


1858
SP
Stout
1071.7
1024.4
6.27
66.02%
13.89
4.08
1.5
2

º
68º
8


1858
X2P
Stout
1066.2
1021.6
5.90
67.36%
13.89
3.77
1.5
2

º
68º
7


1868
X3 P
Stout
1068.4
1030.2
5.06
55.87%
8.00
2.16
1.5
2
2
65º
66º
6


1868
X3 P
Stout
1067.0
1033.5
4.43
50.00%
7.47
2.19
2
2

66º
66º
6


1878
S
Stout
1065.9



7.43
2.05
2
2

70º
70º
6


1878
S
Stout
1066.5
1027.1
5.20
59.17%
7.43
2.12
2
2

70º
69º
6


1878
S
Stout
1065.9



6.86
2.05
2
2

69º
69.5º
6


1888
S
Stout
1067.0
1028.3
5.13
57.85%
7.47
2.07
2


64º
67º
7


1888
S
Stout
1068.7
1029.1
5.24
57.66%
7.47
2.24
2


65º
68º
7


1896
S
Stout
1064.8
1020.5
5.86
68.38%
6.62
1.75
2


62º
66.5º
6


1896
S
Stout
1066.5
1018.3
6.38
72.50%
5.62
1.59
2
2

61º
68.5º
6


Sources:


Tetley brewing records held at the West Yorkshire Archive Service document numbers WYL756/11/ACC1903, WYL756/16/ACC1903, WYL756/25/ACC1903, WYL756/44/ACC1903 and WYL756/49/ACC1903.



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Truman Stout 1855 - 1894


Year
Beer
Style
OG
FG
ABV
App. Atten-uation
lbs hops/ qtr
hops lb/brl
boil time (hours)
boil time (hours)
boil time (hours)
Pitch temp
max. fermen-tation temp
length of fermen-tation (days)


1855
Stout
Stout
1071.7
1025.2
6.16
64.86%
13.6
4.41



63º
78º
9


1860
Stout
Stout
1069.5
1019.9
6.56
71.31%
14.1
4.70



63º
º



1870
Running Stout
Stout
1069.8
1016.6
7.04
76.19%
12.2
4.40



59º
º



1880
Running Stout
Stout
1074.8
1024.9
6.60
66.67%
12.8
4.48



58º
º



1894
SS
Stout
1075.9



11.0
4.10
2
2
3
60º
º



Sources:


Truman brewing records held at the London Metropolitan Archives document numbers B/THB/C/057, B/THB/C/062, B/THB/C/072, B/THB/C/082 and B/THB/C/096.



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