Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. When a certain way Of looking at the universe meets with the extraordinary success with which that of physics has met it becomes the duty Of the philo Sopher to investigate it with care; for it is likely to Offer a very much better Cosmology than his own unaided efforts can do. And, if philosophy is to take into account empirical facts – and it is extremely diffi cult to see what it will be able to tell us about the existent unless it does – it can hardly neglect the most fruitful and thorough investigation Of certain large branches Of empirical facts that has yet been made.