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Further comments on convection currents in a water calorimeter

I have completed an investigation that allows a firmer basis for comments on convection currents in a water calorimeter than the mostly speculative comments made by Domen (1986) and Schulz (1986), where we commented on a paper by Schulz and Weinhous (1985). To explain a suspected artifact in the calorimeter runs (at 30 "C) recorded by Schulz and Weinhous, I speculated that (because electrical powers caused the thermistors initially to rise to equilibrium temperatures above the surrounding water) convective velocities may have been sufficiently high to significantly lower the equilibrium temperatures (in the proximal thermistors) due to their increased rates of heat transfer. They were located in an upward convective stream and at 12 mm from a polystyrene vertical entrance wall heated (above the adjacent water) by horizontal irradiation. The heated wall was the main driving force which caused the convection. It is important to note that rather large electrical powers of 80 pW were dissipated in each thermistor. This was the main underlying basis of my speculations. Figure l shows the experimental set-up (not to scale) for investigating effects of natural convection simulated by forced convection (Domen 1988). A calibrated thermistor (0.25 mm in diameter) was positioned on the axis of a tube mounted in a container (C) surrounded by insulation (not shown). A tube connected C to a water column supporting a micrometer. Tubes connected C to valves V, and V2 and to an