V Vibrations Contributions to Evolution To me it seems that my contributions to the theory of evolu- tion have been mainly these : 1. The identification of heredity and memory and the corollaries relating to sports, the reversion to remote ancestors, the phenomena of old age, the causes of the sterility of hybrids and the principles underlying longevity—all of which follow as a matter of course. This was Life and Habit. [1877.] 2. The re-introduction of teleology into organic life which, to me, seems hardly (if at all) less important than the Life end, Habit theory. This was Evolution Old and New. [1879.] 3. An attempt to suggest an explanation of the physics of memory. I was alarmed by the suggestion and fathered it upon Professor Hering who never, that I can see, meant to say anything of the kind, but I forced my view on him, as it were, by taking hold of a sentence or two in his lecture, on Memory as a Universal Function of Organised Matter, and thus connected memory with vibrations. This was Un- conscious Memory. [1880.] What I want to do now [1885] is to connect vibrations not only with memory but with the physical constitution of that body in which the memory resides, thus adopting New- land's law (sometimes called MendelejefFs law) that there is only one substance, and that the characteristics of the vibrations going on within it at any given time will determine whether it will appear to us as (say) hydrogen, or sodium, or chicken doing this, or chicken doing the other. [This is touched upon in the concluding chapter of Luck or Cunning ? 1887.] 66