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The original gravity is the specific gravity measured before fermentation. From it the analyst can compute the original extract which is the mass (grams) of sugar in 100 grams (3.5 oz) of wort (°P) by use of the Plato scale. The symbol will denote OE in the formulas which follow.
The following fields form the core information of the BeerXML structure . Recipes; Recipe name Brewer Brewing method (All grain, Partial Mash, Extract) Recipe Type (Ale, Lager, Hybrid, etc.) Recipe volume (Run length) Boil volume (Wort size) Boil time (duration) Recipe efficiency Estimated values OG (Original Gravity) FG (Final Gravity) Color (SRM) Bitterness () Alcohol content (%abv)
A basic formula [4] to calculate beer strength based on the difference between the original and final SG is: A B V = 131.25 ( O G − F G ) {\displaystyle ABV=131.25(OG-FG)} The formula below [ 5 ] is an alternate equation which provides more accurate estimates at higher alcohol percentages (it is typically used for beers above 6 or 7%).
Early London porters were strong beers by modern standards. Early trials with the hydrometer in the 1770s recorded porter as having an original gravity (OG) of 1.071 and 6.6% alcohol by volume (ABV). [17] Increased taxation during the Napoleonic Wars pushed its gravity down to around 1.055, where it remained for the rest of the 19th century ...
The original gravity of a beer was the basis for determining taxation in both the UK and Ireland from 1880 until the late 20th century, and a legacy of that system remains in the largely arbitrary division of bitter into "bitter", "best bitter", and "special bitter" substyles.
Replicating the basic yet unique texture and flavor of McDonald's fries involves special attention to the shoestring thickness and the heat of the cooking oil. Recipe: Food.com 4kodiak / istockphoto
Historical analyses from the time period of 1849 to 1986 show that the beer had an original gravity between 1.100 and 1.107 and an alcohol content of around 10% ABV. This remained virtually unchanged over the whole time period. [54] A recipe from 1856 also indicates that it was hopped at a rate of 10 pounds of hops to the barrel (28 g/L).
In 1926, Manns Brown Ale had an original gravity of 1.043 and an ABV of around 4%. [5] Whitbread Double Brown was even stronger, an OG of 1.054 and more than 5% ABV. [ 6 ] The introduction of these beers coincided with a big increase in demand for bottled beer in the UK.