1. Motsay, R. W. , Anderson, K. E. & Behringer, R. P. 1988 The onset of convection and turbulence in rectangular layers of liquid helium.J. Fluid Mech. (in press).
2. Luijkx, J. M. & Platten, J. K. 1981 On the onset of free convection in a rectangular channel.J. Non-Equilibr. Thermodyn. 6,141–158.
3. Malkus, W. V. R. 1954b The heat transport and spectrum of thermal turbulence.Proc. R. Soc. Lond. A225,196–212.
4. Davis, S. H. 1967 Convection in a box: linear theory.J. Fluid Mech. 30,465–478.
5. Busse, F. H. 1967 On the stability of two-dimensional convection in a layer heated from below.J. Math. Phys. 46,140–150.