18 SUPPLEMENT. 
found to have lost by drainage from 100 to 150 lbs., or from 10 to 15 
per cent. 
Assuming these propositions to be true, I make the following esti- 
mate of the probable yield of an acre of canes of ordinary growth, 
such as I have experimented upon, viz. : 
Actual yield as per Experiment No. 4, 1221.85 lbs. sugar, 74 39 molasses. 
Add for inefficiency of mill, 10 per cent. 
For heating and reheating, &c., 
For footings, say but* 
20 per cent. 244.37 
Probable yield per acre, lbs. 1466.22 sugar: galls. 74.39 molasses. 
Further, it will be observed that my acre produced but 1847 gal- 
lons of juice. I have, however seen published accounts of far greater 
yield than this ; one, for instance, in this county, apparently well au- 
thenticated, reaching 6,800 gallons per acre, which, according to my 
actual results, would produce 4499 lbs. of sugar, and 274 gallons mo- 
Jasses—and according to the foregoing probable results, would yield 
5389 lbs. sugar, and 274 gallons to the acre. I do not pronounce 
such yield of juice impossible, but it will certainly be of rare occur- 
rence—a mean between this and my yield would be a large return. 
Another subject worthy of notice is the nature of the season. My 
impression is, that owing to the lateness and coldness of the spring, 
and the continued wet weather, the last has been quite an unfavorable 
season for the ripening and development of the sugar in the juice, to 
which cause I think a deficiency in the yield of at least ten per cent. 
may be attributed, which would further increase the quantity to 
1612 lbs. of sugar, and 81 8-10 gallons molasses, a yield very nearly 
corresponding with that of the best conducted plantations of Louisiana, 
as will be seen by the following figures, which I have collated from a 
minute statement furnished to me by the enterprising proprietor of one 
of the most complete and costly establishments in that region, (it 
being furnished with vacuum pans, and all the most approved ma- 
chinery of later times, and conducted under his own personal super- 
vision,) of the actual product of one of his piantations of 266 acres, 
* These two latter gains in sugar would be made at the expense of the molasses, 
taking from it the gain which would be realized by the use of a better mill, and there- 
fore leaving the quantity of molasses unchanged. 
