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Shut up about Barclay Perkins - Heineken (Rotterdam) output in 1939
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Having access to every single page of Heineken's wartime brewing records means I can do all sorts of fun stuff. Like trawling through them recording every gyle: beer, batch size and OG.This give me access to all sorts of interesting and useful data. Like exactly how much of each beer they brewed in a year. Getting hold of that information was my main motivation. But I also get to see how much beer they brewed month-by-month and its average OG.
I'm dead glad that I did. It's revealed some unexpected insights. The first being how much the quantity they brewed varied from month to month. In November they brewed over 35,000 hl, but in August fewer than 11,000 hl. That's a huge difference. Far larger variation than I've ever seen at a UK brewery. And a very different pattern
At Whitbread, the summer was the peak brewing season, with the greatest amount brewed in July, followed by August. It was the exact opposite at Heineken, with those two months being the slackest. I know why Whitbread brewed more in the summer - people drank more beer during warmer weather. But why would Heineken brew less then? Could it be because, if they were lagering for any length of time, beer had to be brewed months in advance?
Second surprise was the average OG. 11.2ยบ Plato is 1044.86 in SG.Not a huge amount greater than the UK average of 1041.02 (1937). I would have expected a continental brewery's average to be quite a bit higher than the UK's.
Heineken (Rotterdam) output and average OG by month |
month |
year |
hl |
grav. Points |
average OG |
Jan |
1939 |
33,594 |
383,843.9 |
11.4 |
Feb |
1939 |
30,712 |
350,098.1 |
11.4 |
Mar |
1939 |
21,793 |
237,043.0 |
10.9 |
Apr |
1939 |
21,178 |
232,720.9 |
11.0 |
May |
1939 |
21,015 |
230,321.8 |
11.0 |
Jun |
1939 |
29,354 |
329,148.0 |
11.2 |
Jul |
1939 |
12,968 |
138,059.7 |
10.6 |
Aug |
1939 |
10,887 |
129,107.3 |
11.9 |
Sep |
1939 |
26,980 |
301,120.3 |
11.2 |
Oct |
1939 |
34,986 |
395,410.6 |
11.3 |
Nov |
1939 |
35,207 |
393,956.5 |
11.2 |
Dec |
1939 |
20,379 |
232,225.5 |
11.4 |
Total |
|
299,053 |
3,353,056 |
11.2 |
Source: |
Heineken brewing records held at the Amsterdamse Stadsarchief, documents number 834 - 1758 and 834 - 1759. |
Whitbread Ale output by month |
month |
year |
barrels |
Jan |
1939 |
29,574 |
Feb |
1939 |
30,114 |
Mar |
1939 |
35,865 |
Apr |
1939 |
39,817 |
May |
1939 |
36,053 |
Jun |
1939 |
42,091 |
Jul |
1939 |
44,130 |
Aug |
1939 |
40,878 |
Sep |
1939 |
37,476 |
Oct |
1939 |
33,246 |
Nov |
1939 |
35,365 |
Dec |
1939 |
39,100 |
Total |
1939 |
443,709 |
Source: |
Whitbread brewing record held at the London Metropolitan Archives, document number LMA/4453/D/01/103. |
Heineken (Rotterdam) output by beer in 1939 |
Beer |
OG |
hl |
% |
Bok |
17.2 |
1,713 |
0.57% |
Mei |
15.2 |
2,163 |
0.72% |
Bei |
12.5 |
4,435 |
1.48% |
Do |
8.9 |
26,429 |
8.84% |
Li |
8.9 |
41,036 |
13.72% |
P Exp |
11.8 |
43,004 |
14.38% |
P |
11.8 |
180,273 |
60.28% |
total |
|
299,053 |
|
Sources: |
Heineken brewing records held at the Amsterdamse Stadsarchief, documents number 834 - 1758 and 834 - 1759. |
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