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09-06-2014, 09:32
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I just love the Journal of the Institute of Brewing. Especially the fact that it's all available online.

I've trawled through it a few times using different search terms. When I find a useful article, I save the pdf and extract the text. I've quite a pile of them, waiting for my attention. Including one on the food value of beer. Which I've finally got around to looking at.

Not that I'm all that interested in the food value of beer. But the article has loads of tables with data taken from beer analyses. And I'm a total tart for any type of beer analysis.

What makes them particularly handy is that there are separate tables of London and provincial beers of different types. Giving me a chance to check something I've seen mentioned but have never found real proof for: that London-brewed beers were stronger. I think originally it was because London brewers, being on the whole quite large, could brew more efficiently. As beer generally sold for the same price everywhere, there wasn't much competition on price. Brewers drew in drinkers by offering a stronger product.

I've combined two different tables from the article, plus added a calculated ABV. First, London Milds:



Composition of London Beers







Calories per pint.



Total Solids per cent.
Absolute Alcohol (by weight) per cent.
Ratio of Total Solids to Alcohol (T.S.=1).
ABV
Solid Matter.
Alcohol.
Total.


Mild Ales.









No. 1
4.35
3.16
1:0.72
4.01
102
126
228


No. 2
5.00
2.98
1:0.59
3.78
116
118
234


No. 3
3.87
3.41
1:0.88
4.33
90
136
226


No. 4
6.00
3.94
1:0.65
5.00
140
156
296


No. 5
4.91
3.08
1:0.62
3.91
114
121
235


No. 6
4.74
3.18
1:0.67
4.04
110
126
230


No. 7
5.17
2.90
1:0.56
3.68
120
115
235


No. 8
4.90
4.37
1:0.89
5.55
114
174
288


No. 9
4.62
2.98
1:0.64
3.78
108
118
220


Average
4.84
3.33
1:0.68
4.23
114
130
244


Source:


Journal of the Institute of Brewing, Volume 38, Issue 1, January-February 1932, pages 84 - 88.




That's odd. The average ABV is what I would expect for a London X Ale, a bit over 4% implying on OG of around 1043. But that average has been distorted by the two much stronger examples, Nos. 4 and 8. The relative large proportion of calories which comes from the solid matter implies a fair amount of unfermented material in the finished beer. You'll see better what I mean when I compare Bitter and Mild in a later post.

Now here are the country beers:



Composition of Country Beers







Calories per pint.



Total Solids per cent.
Absolute Alcohol (by weight) per cent.
Ratio of Total Solids to Alcohol (T.S.=1).
ABV
Solid Matter.
Alcohol.
Total.


Mild Ales.









No. 27
2.47
2.81
1:1.13
3.57
58
112
170


No. 28
4.40
3.83
1:0.87
4.86
103
152
255


No. 29
2.32
2.92
1:1.25
3.71
54
116
170


No. 30
2.69
3.61
1:1.34
4.58
63
143
200


No. 31
2.81
3.57
1:1.27
4.53
65
142
207


No. 32
3.29
3.06
1:0.03
3.89
77
121
198


No. 33
4.02
3.58
1:0.89
4.55
94
142
236


No. 34
4.54
2.92
1:0.64
3.71
106
116
222


No. 35
4.57
2.74
1:0.59
3.48
106
109
215


No. 36
6.58
3.58
1:0.54
4.55
153
142
295


No. 37
2.53
2.19
1:0.86
2.78
59
87
140


No. 38
3.24
2.70
1:0.83
3.43
75
107
182


No. 39
3.49
2.60
1:0.74
3.30
81
103
184


No. 40
4.76
2.00
1:0.60
2.54
111
115
220


No. 41
4.79
3.06
1:0.63
3.89
112
122
234


No. 42
5.74
4.15
1:0.72
5.27
133
165
298


No. 43
3.61
2.79
1:0.77
3.54
84
111
195


No. 44
3.28
2.93
1:0.89
3.72
76
116
192


No. 45
3.38
2.94
1:0.86
3.73
79
117
196


No. 46
2.49
2.54
1:1.02
3.23
58
101
159


No. 47
3.99
3.78
1:0.94
4.80
93
150
243


No. 48
2.72
2.81
1:1.03
3.57
63
112
175


No. 49
3.15
3.15
1:1.00
4.00
73
125
198


Average
3.69
3.09
1:0.83
3.92
86
123
209


Source:


Journal of the Institute of Brewing, Volume 38, Issue 1, January-February 1932, pages 84 - 88.



As you can see, the country-brewed Milds were indeed weaker. But I was surprised to see that to see that they were also more highly-attenuated. That becomes much clearer when you make a direct comparison of the averages:








Calories per pint.



Total Solids per cent.
Absolute Alcohol (by weight) per cent.
Ratio of Total Solids to Alcohol (T.S.=1).
ABV
Solid Matter.
Alcohol.
Total.


London
4.84
3.33
1:0.68
4.23
114
130
244


Country
3.69
3.09
1:0.83
3.92
86
123
209


% difference
-31.17%
-7.77%
0.25%
-7.77%
-32.56%
-5.69%
-16.75%



The country beers have less of everything: alcohol, unfermented material, calories.

One word of warning. There are at least two different types of Mild in the country beers. Ones around 3% ABV are 4d Ales, while those around 4% are X Ales. There aren't any of the former in the London examples, though such beers were brewed in London.

More... (http://barclayperkins.blogspot.com/2014/06/london-vs-provincial-beer-in-1930s-mild.html)