A seed crystal can be dropped into a saturated solution of sodium acetate. The solution will suddenly crystallize and turn to solid. Alternately, the solution may be slowly poured out onto a seed ...
Correspondence to Dr David Nunan, Centre for Evidence-Based Medicine, Nuffield Department of Primary Care Health Science, University of Oxford, Oxford OX2 6GG, UK; david.nunan{at}phc.ox.ac.uk To ...