the manure heap.  Much of the beneficial effect of the mucilage of the guazuma arises probably from an admixture of tannin, or some other astringent; for I have often been struck with the peculiar whiteness of the potted sugar in the curing-house, in the immediate vicinity of the Banana stalks, resulting, no doubt, from their powerful astringency; and tannin has already been found useful in the manufacture of sugar from beet-root in France, and is no doubt equally applicable to cane-sugar.

The liquor, when clarified in the manner described, must be concentrated, by regulated evaporation, to the degree requisite for crystallisation.  This Mr. Fownes advises to be done by steam of a moderate pressure circulating in a spiral of copper-pipe laid at the bottom of the evaporating vessels, which should be large and shallow, and wholly unlike those in present use.  Here it may be rapidly boiled down till the heat rises to about 225 deg., without risk of burning.  When cold, it should have a density of about 1.38, and mark the 38th degree of Baume’s hydrometer; beyond which point of inspissation it would be dangerous to go.  The remaining concentration will be most safely conducted in the vacuum pan, where a scarcity of water does not, as in Barbados, militate against its use.

Mr. Fownes exposes the absurdity of using shallow coolers, exposing a large surface, and producing a rapid evaporation, for the process of crystallisation.  By the use of the shallow coolers formerly, and, I believe, yet to be found on most estates, from the rapidity of the evaporation, the sugar is obtained in a mass of confused and imperfectly-formed crystals, entangling in their interstices a considerable quantity of molasses, which impairs the color of the product, and escaping slowly, and with difficulty, is, to a considerable extent, lost on the homeward voyage by drainage into the hold, occasioning much positive loss to the owner, and giving the bilge-water a most offensive odor.  He therefore recommends the use of deep vessels, and avoidance of all agitation in this part of the process, so as to enable the crystallisable portion of the syrup to effect a more complete separation from the uncrystallisable portion or the molasses.  By this simple method, not only sugar of a finer and whiter quality would be obtained, but a large per centage of loss both of crystallisable and uncrystallisable sugar at present caused by the leakage of the hogshead into the hold, would be prevented, not only to the great advantage of the planter, but to the great comfort of the captain, passengers, and crew of the vessel freighted with it.

It is not improbable that, by re-boiling the molasses in the vacuum-pan, and employing tannin in the manner adopted in the process for making sugar from beet-root, from one to five per cent. of crystallisable sugar could be recovered from it, and this per centage might possibly even be found to admit of increase by the further treatment with lime-water and the gun-stock tree s already suggested, for the first clarification of the liquor received from the mill.  With this view, Mr. Fownes recommends the substitution of puncheons, or casks, for the molasses cisterns ordinarily employed in the curing-house, to receive the molasses as it drains from the new sugar, and thus retaining it until after the busy period of crop time has closed.