Haeckel was preserved from this school by his more immediate masters, as well as by Goethe himself; firstly by Johannes Müller, then by the botanist Schleiden, finally by the influence of Gegenbaur. There was at the time enough, and more than enough, of this external museum-morphology. It was far from Haeckel’s intention to produce a new compendium, in several volumes, of this kind of science of plants and animals. His morphology was to be “general,” to have a broader range, be a programme. As Richard Hertwig said very happily at a later date, he saw his science, not as it then was, but as it _ought_ to be, in his opinion. The science of forms was to be in the fullest sense a “philosophy of forms.” “Zoological philosophy” was the name given by the hapless Lamarck, in France a century ago, to a work that appeared in the year that Darwin was born, and anticipated his most advanced thoughts. Haeckel, also, gave a new “philosophy of zoology and botany.” The title embodies the magic formula that gave him courage to take up resolutely once more the proscribed word, that seemed to have been scalded and spoiled for ever in the witches’ cauldron of “natural philosophy”; it spoke of the “theory of descent as reformed by Charles Darwin.” Two sub-titles divided the work into two sections from the start. The first part was, the critical elements of the mechanical science of the developed forms of organisms (animal and plant); the second part was, the same elements of the mechanical science of the developing forms of organisms.