2. Inspiration and Intuition

The process is made comprehensible for children by means of a practical demonstration which seems to show it very clearly. A drop of oil is taken, sufficiently fluid to float on a little water; this is placed on a piece of card where the line of the equator is supposed to come; a pin is run through the card and the card is whirled round. It can then be shown how, one after another, drops of oil detach themselves and rotate, and you can get a miniature planetary system out of the oil, with a sun left in the middle. When that has been shown to us in childhood, why should we think it impossible for our planetary system to have arisen out of the primeval nebula? With our own eyes we have seen the process reproduced.