It is not only my laboratory and my place of work but also my home, so that on the 30th October I was able to share my happiness immediately with my students and collaborators and, at the same time, with my wife and family.

When the honour is given to that scientist personally the happiness is sweet indeed. Science is, on the whole, an informal activity, a life of shirt sleeves and coffee served in beakers.

Tonight I should like to thank all those who have shared my work and to acknowledge the debt that I owe to my wife whose encouragement to put research before all other things has been a great strength to me.

I have no doubt that we will be successful in harnessing the sun's energy. If sunbeams were weapons of war, we would have had solar energy centuries ago.