1. The following comment is attributed to the Russian physiologist Ivan Petrovich Pavlov (1849–1936): ‘Get up in the morning with your problem before you. Breakfast with it. Go to the laboratory with it. Eat your lunch with it. Keep it before you after dinner. Go to bed with it in your mind. Dream about it,’ quoted by J. R. Baker,Science and the Planned State(London: Macmillan, 1945, p. 55) and by M. Polanyi,Personal Knowledge. Towards a Post-Critical Philosophy(London: Routledge and Kegan Paul, 1983) 2nd ed., p. 127. ‘Take counsel of your pillow’ is an advice to passionate problem solvers, recommended by a mathematician in a section of his book entitled “subconscious work”: G. Polya,How to Solve It. A New Aspect of Mathematical Method(New York: Doubleday Anchor 1957), 2nd ed., pp. 197–8.
2. Spectroscopy and the Chemists: A Neglected Opportunity?
3. Bunsen Memorial Lecture
4. Prof. Kirchhoff