IN his presidential address to the hundred and twenty-first annual meeting of the British Association Sir James Gray, F.R.S., said that until individual nations were prepared to think in terms of the welfare of humanity as a whole there would be continued potential danger and waste of human effort. He said that frightened or angry men, like frightened or angry animals, cannot be trusted to act wisely and scientists would not make much impression on public opinion so long as men's minds were based on fear and suspicion. In presenting science to the public scientists should have the primary objective . . .