No abstract

is rnatlc to contribute to the "efficiency" of the dryer. My sole contention was that the efficiency of a drying machine was in no way a function of its capacity for heating sand. I dirt indeed point out that the gublished figures required that about 3 3 per cent of the discharged water must be in the form of mist or liquid water, and I said, "if this is possible it opecs u p a ~v a p to extraordimry possibilities in drying economies." This does not appear t o me to difFer from Prof. Lewis' attitude ol "unlikely but not impossible." The theory of re-condensation and fog formatioil has been advanced a number of times. I agree absolut.ely with Prof. T,ewis about it, that it is by no means impossible, but is unlikely, and that the conditions under which it can occur are unusual. Personally, in a limited experience, I have not come

No abstract