THREE:At the same time Lucretius is resolved that no false analogy shall obscure the distinction between life and the conditions of life. It is for attempting, as he supposes, to efface this distinction that he so sharply criticises the earlier Greek thinkers. He scoffs at Heracleitus for imagining that all forms of existence can be deduced from the single element of fire. The idea of evolution and transformation seems, under some of its aspects, utterly alien to our poet. His intimacy with the world of living forms had accustomed him to view Nature as a vast assemblage of fixed types which might be broken up and reconstructed, but which by no possibility could pass into one another. Yet this rigid retention of characteristic differences in form permits a certain play and variety of movement, an individual spontaneity for which no law can be prescribed. The foedera Naturai, as Prof. Sellar aptly observes, are opposed to the foedera fati.206 And109 this is just what might be expected from a philosophy based on the contemplation of life. For, while there is no capriciousness at all about the structure of animals, there is apparently a great deal of capriciousness about their actions. On the other hand, the Stoics, who derived their physics in great part from Heracleitus, came nearer than Lucretius to the standpoint of modern science. With them, as with the most advanced thinkers now, it is the foedera Naturaithe uniformities of co-existencewhich are liable to exception and modification, while the foedera fatithe laws of causationare necessary and absolute.
THREE:77
THREE:No little astonishment was therefore created by an interview which I published with Dr. van der Goot of The Hague, who did so much excellent work in the Red Cross Hospital at Maastricht. He also had come to believe all these stories, and as everybody always mentioned a large hospital in Aix-la-Chapelle, which was said to be full of similarly mutilated soldiers, Dr. van der Goot went to that91 town to see for himself. The chief medical officer of that hospital in a conversation stated that not one single case of that sort had been treated in his institution nor in any of the other local hospitals where he was a visiting physician. At a meeting of the medical circle just lately held he had not heard one word, nor had any one colleague, about the treatment of similar cases.This method of treating the subject of motive-engines will no doubt be presenting it in a new way, but it is merely beginning at an unusual place. A learner who commences with first principles, instead of pistons, valves, connections, and bearings, will find in the end that he has not only adopted the best course, but the shortest one to understand steam and other expansive engines.
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