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18-01-2011, 09:24
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Ah, another new decade of Whitbread Porter. This time the 1830's. You may have detected a certain logic to this. Starting at the beginning and moving forwards in time in a linear fashion until I reach the end. Seems a logical enough approach.

Brown malt. I have to mention that. Especially in regard to that classic made-up style, Robust Porter.You'll see that Whitbread only briefly flirted with a brown malt-free grist. In 1832 brown malt was not only back in the grist, but in a considerably greater quantity than it had been at any time since the introduction of black malt. Mostly it madee up 10% ofr more og the grist, while in the 1820's (http://barclayperkins.blogspot.com/2011/01/whitbread-porter-1821-1830.html) it had been just 3 or 4%.

The proportion of black malt continued to creep up. It rose from around 1.5% at the start of the decade to closer to 2.5% by its end. You'll see later that this trend continued right through the 19th century.

After 1839, there was a significant drop in the hopping rate, falling from 14 lbs per quarter to 11. This took it back to about the same level it had been in the early 1820's (http://barclayperkins.blogspot.com/2011/01/whitbread-porter-1821-1830.html). Yet with 2.5 to 2.75 lbs of hops per barrel, you couldn't describe theses these beers as lightly-hopped. Time for me to bang on about Porter being something you would expect to be quite heavily-hopped, it being a Beer rather than an Ale. But I'm sure you've remembered that.

The gravity was, at 1060-1062, a couple of points higher than in the 1820's. Attenuation remained much the same, 67-70%. The pitching temperature, mostly 63.5-64º F was perhaps half a degree cooler on average than in the 1820's. No very significant change there. The first wort was boiled a tad longer.


Whitbread Porter 1831 - 1840
Date
Year
Beer
OG
FG
ABV
App. Atten-uation
lbs hops/ qtr
hops lb/brl
boil time (hours)
boil time (hours)
boil time (hours)
boil time (hours)
Pitch temp
pale malt
brown malt
black malt
total
24th Mar
1831
P


1057.1


1019.1


5.02


66.50%


14.87


3.53


1


1.5


3


4


64º


98.22%




1.78%


100.00%
15th Aug
1831
P


1058.4


1019.9


5.09


65.88%


18.06


4.57


1.25


2.5


4




64º


98.51%




1.49%


100.00%
17th Sep
1831
P


1058.7








13.13


3.33


1.25


2.5


4




64º


98.58%




1.42%


100.00%
30th Mar
1832
P


1058.4


1017.2


5.46


70.62%


12.99


3.29


1


1.5


3


4


64º


88.50%


10.15%


1.35%


100.00%
8th Nov
1832
P


1058.2


1019.4


5.13


66.67%


12.61


3.23


1.25


2


4




63.5º


87.76%


10.88%


1.36%


100.00%
19th Nov
1832
P


1058.2


1019.1


5.17


67.14%


12.72


3.31


1.25


2


4




64º


87.76%


10.88%


1.36%


100.00%
21st Mar
1833
P


1058.7


1016.1


5.64


72.64%


12.48


3.17


1


1.5


3


4


63.5º


86.05%


12.36%


1.59%


100.00%
17th Aug
1833
P


1058.4


1018.0


5.35


69.19%


12.55


3.73


1


2


4




64.5º


88.42%


10.05%


1.53%


100.00%
19th Oct
1833
P


1058.7


1016.1


5.64


72.64%


13.25


3.31


1


2


4




64º


87.59%


10.86%


1.55%


100.00%
11th Aug
1834
P


1059.6


1016.9


5.64


71.63%


12.48


3.52


1


2


3




64º


88.35%


9.67%


1.98%


100.00%
14th Aug
1834
P


1059.3


1018.3


5.42


69.16%


13.02


3.45


1


2


3




63.5º


87.76%


10.16%


2.08%


100.00%
16th Aug
1834
P


1060.9


1019.4


5.50


68.18%


13.08


3.52


1


2


3




64.25º


87.76%


10.16%


2.08%


100.00%
11th Dec
1834
P


1058.7


1017.5


5.46


70.28%


13.11


3.35


1


2


3




64º


85.79%


12.46%


1.75%


100.00%
31st Oct
1834
P


1059.3


1018.3


5.42


69.16%


12.89


3.25


1


2


3




64º


85.79%


12.46%


1.75%


100.00%
6th Aug
1835
P


1060.1


1017.2


5.68


71.43%


12.53


3.27


1


1.5


3


4


63.25º


83.04%


15.08%


1.88%


100.00%
19th Oct
1835
P


1061.2


1018.6


5.64


69.68%


13.47


3.49


1


1.5


3


4


63.5º


88.93%


9.23%


1.85%


100.00%
15th Jul
1836
P


1064.0


1019.9


5.83


68.83%


14.56


3.57


1.5


1.5


3


4


63.5º


77.43%


19.80%


2.77%


100.00%
3rd Aug
1836
P


1064.3


1017.7


6.16


72.41%


14.25


3.45


1.5


1.5


3


4


63º


77.43%


19.80%


2.77%


100.00%
30th Nov
1836
P


1061.2


1018.0


5.72


70.59%


14.74


3.64


1.5


1.5


3


4


63.5º


90.11%


7.61%


2.28%


100.00%
18th May
1837
P


1060.1


1018.8


5.46


68.66%


13.67


3.18


1.5


1.5


3


4


63.5º


89.94%


7.59%


2.47%


100.00%
8th Jul
1837
P


1060.4


1019.9


5.35


66.97%


12.81


2.89


1.5


1.5


3


4


63.5º


89.94%


7.59%


2.47%


100.00%
19th Jul
1837
P


1060.1


1018.6


5.50


69.12%


13.61


3.31


1.5


1.5


3


4


63.75º


89.94%


7.59%


2.47%


100.00%
30th Aug
1837
P


1059.8


1018.0


5.53


69.91%


13.79


3.34


1.5


1.5


3


4


64º


81.98%


15.67%


2.35%


100.00%
24th Jul
1837
P


1059.8


1019.4


5.35


67.59%


13.51


3.17


1.5


1.5


3


4


63.5º


89.94%


7.59%


2.47%


100.00%
6th Sep
1837
P


1059.6


1017.5


5.57


70.70%


13.76


3.29


1.5


1.5


3


4


63.5º


81.98%


15.67%


2.35%


100.00%
4th Sep
1837
P


1058.7


1017.7


5.42


69.81%


13.83


3.26


1.5


1.5


3


4


64º


81.98%


15.67%


2.35%


100.00%
30th Oct
1837
P


1059.0


1019.4


5.24


67.14%


13.85


3.19


1.5


1.5


3


4


63.5º


86.10%


11.58%


2.32%


100.00%
19th Oct
1837
P


1059.6


1018.0


5.50


69.77%


13.76


3.28


1.5


1.5


3


4


63.5º


86.10%


11.58%


2.32%


100.00%
4th Aug
1838
P


1059.8


1021.6


5.06


63.89%


13.01


2.97


1.5


1.5


3


4


64º


86.10%


11.58%


2.32%


100.00%
31st Jul
1838
P


1061.5


1018.8


5.64


69.37%


12.96


3.19


1.5


1.5


3


4


64º


86.10%


11.58%


2.32%


100.00%
11th Sep
1838
P


1061.8


1021.1


5.39


65.92%


14.07


3.47


1.5


1.5


3


4


62º


86.10%


11.58%


2.32%


100.00%
20th Oct
1838
P


1061.2


1019.1


5.57


68.78%


11.77


2.97


1.5


1.5


3


4


63.5º


86.10%


11.58%


2.32%


100.00%
27th Sep
1838
P


1061.5


1019.4


5.57


68.47%


14.28


3.37


1.5


1.5


3


4


63.25º


86.10%


11.58%


2.32%


100.00%
28th Jan
1839
P


1062.3


1018.8


5.75


69.78%


14.14


3.34


1.5


1.5


3


4


63.5º


86.10%


11.58%


2.32%


100.00%
24th Aug
1839
P


1061.8


1019.4


5.61


68.61%


10.50


2.53


1.5


1.5


3


4


64º


86.10%


11.58%


2.32%


100.00%
3rd Aug
1839
P


1062.3


1019.9


5.61


68.00%


10.64


2.60


1.5


1.5


3


4


66º


86.10%


11.58%


2.32%


100.00%
2nd Sep
1839
P


1061.5


1019.1


5.61


68.92%


10.32


2.56


1.5


1.5


3


4


63.5º


86.10%


11.58%


2.32%


100.00%
16th Nov
1839
P


1061.5


1020.8


5.39


66.22%


9.98


2.95


1.5


1.5


3


4


64º


86.10%


11.58%


2.32%


100.00%
9th Sep
1839
P


1062.0


1020.8


5.46


66.52%


10.46


2.51


1.5


1.5


3


4


63.5º


86.10%


11.58%


2.32%


100.00%
14th Sep
1839
P


1061.2


1019.7


5.50


67.87%


10.28


2.51


1.5


1.5


3


4


63.5º


86.10%


11.58%


2.32%


100.00%
25th Sep
1839
P


1061.8


1020.5


5.46


66.82%


10.27


2.56


1.5


1.5


3


4


63.5º


86.10%


11.58%


2.32%


100.00%
19th Oct
1839
P


1062.6


1021.3


5.46


65.93%


10.31


2.60


1.5


1.5


3


4


63.5º


86.10%


11.58%


2.32%


100.00%
27th Jul
1840
P


1061.8


1020.2


5.50


67.26%


10.94


2.71


1.5


1.5


3


4


63.5º


86.10%


11.58%


2.32%


100.00%
13th Jul
1840
P


1061.5


1020.2


5.46


67.12%


10.68


2.61


1.5


1.5


3


4


63.5º


86.10%


11.58%


2.32%


100.00%
28th Jul
1840
P


1062.9


1018.8


5.83


70.04%


11.13


2.88


1.5


1.5


3


4


64º


86.10%


11.58%


2.32%


100.00%
10th Aug
1840
P


1062.6


1020.2


5.61


67.70%


11.11


2.81


1.5


1.5


3


4


63.75º


86.10%


11.58%


2.32%


100.00%
18th Aug
1840
P


1061.8


1018.0


5.79


70.85%


10.83


2.70


1.5


1.5


3


4


63.75º


86.10%


11.58%


2.32%


100.00%
16th Sep
1840
P


1061.8


1020.5


5.46


66.82%


10.44


2.64


1.5


1.5


3


4


63.5º


86.10%


11.58%


2.32%


100.00%
19th Oct
1840
P


1062.0


1019.7


5.61


68.30%


10.92


2.82


1.5


1.5


3


4


63.5º


85.94%


11.56%


2.50%


100.00%
Source:
Whitbread brewing records held at the London Metropolitan Archives
Documents:
LMA/4453/D/09/024, LMA/4453/D/09/025, LMA/4453/D/09/026, LMA/4453/D/09/027, LMA/4453/D/09/028, LMA/4453/D/09/029, LMA/4453/D/09/030, LMA/4453/D/09/031, LMA/4453/D/09/032, LMA/4453/D/09/033, LMA/4453/D/09/034


http://1.bp.blogspot.com/_CHrKKDU9290/TTQYiTOFSOI/AAAAAAAAHtU/JSxeDxpsd1c/s320/Whitbread_Porter_1831_1840.JPG (http://1.bp.blogspot.com/_CHrKKDU9290/TTQYiTOFSOI/AAAAAAAAHtU/JSxeDxpsd1c/s1600/Whitbread_Porter_1831_1840.JPG)


The table shows the way Porter evolved through the 19th century. The occasional dramatic change followed by long periods of little or only very gradual change. The sudden reintroduction of brown malt to the grist in 1832 must have caused a perceptible difference in the finished beer.While the gradual edging up of the black malt content probably went unnoticed by drinkers.https://blogger.googleusercontent.com/tracker/5445569787371915337-5466702769600287402?l=barclayperkins.blogspot.com


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