HTC values for the second vessel of the pair are invariably lower than for the first vessel, to tune of some 50 % except in the case of the small fletcher tail at Darnell. Over all HTC for the last effect as a whole is no better, and perhaps somewhat lower, than for a single-vessel last effect. Parallel juice feed would equalize the HTC values but would introduce split control problems as well as eliminating the low-brix advantage in the first vessel of the pair. In general , operating results from this expansion route philosophy