Prior to jest effect, viscosities seldom exceed 1 centipoise and there is little evidence of reduction in HTC with increasing effect number. This is contrary to accepted technology where a linear decrease is usually assumed (Hugo) but in line with measurements carried out by the sugar milling research institute on a pilot climbing film evaporator (James et al). as regards the actual HTC levels found here, little can be said in that nearly all lie between 1,8 and 3,5 kw with the few outliers probably due to undetected determination problems. The measurement techniques used are clearly insufficiently accurate for closer quantification, perhaps largely due to sensitivity to temperature estimation mentioned earlier, although they have succeeded in pinpointing areas of gross malfunction. We believe that procedures used in future should be based on continuous instrumented monitoring of individual vessels, rather than sequential measurements on all vessels (often 10 or more) which limits the number of readings that can be taken and thus the accuracy of resultant averages.