93
unrefined muscavado sugar at 16 cwt. (1792 lbs) and 10,000 gallons of rum produced
6.25 gallons of rum per cwt. of sugar. However, if that same plantation clayed its sugar and removed the weight in molasses, then that plantation would have only produced 66.6 hogsheads of sugar and, thus, 9.38 gallons of rum per cwt. of sugar. In fact, subtracting the one-third of the sugar weight from Edwards' model would have increased the ratio of
4.5 gallons of rum per cwt. of sugar to 6.8 gallons.
In Edwards' model, the 200 hogsheads of muscavado weighed 358,400 lbs. Had this muscavado been clayed, Edwards would have received 252,394 lbs (141 hogsheads of 16 cwt.) of clayed sugar and 106,006 lbs. of molasses. How much more rum could that molasses have produced? One simple approach is to base rum production on the weight of molasses. A gallon of molasses weighs about 11 lbs and it was widely accepted that a gallon of molasses could make a gallon of rum (anonymous 1737;11:242). Thus, the 106,006 lbs. of molasses would have provided the still house with an additional 9,637 gallons of rum. The increasing amount of rum and the decreasing weight of clayed sugar would have boosted Edwards' ratio to 10.7 gallons of rum per cwt. of sugar.
There are, however, other ways to determine the potential amount of rum from the 106,006 lbs of molasses. According to Wray, a gallon of "common average molasses" contained 65% sucrose. On a brix scale, a scale used in the modern sugar industry to measure the sucrose content of molasses, this molasses represents a gallon weighing 10.977 lbs of which 7.135 lbs is sucrose and the remaining 3.842 is mostly water. If we accept Wray's estimate of molasses at 65% sucrose, we should be able to obtain, based on Wray's calculations, 5.66 gallons of rum for every 100 lbs. This would have produced another 6,000 gallons of rum, raising Edwards' ratio to 9.0 gallons of rum per cwt. of sugar. Yet, there is even another, more technical, way to determine the potential of this molasses for use in rum making. According to Indian sugar engineer P.J. Manohar Rao (1997), one gram of sugar can produce, under almost ideal conditions, 0.6448 ml. of absolute alcohol. Thus, 106,006 pounds of molasses containing 65% sucrose could