The subject was practically dormant for nearly a century and a half, largely owing to the dominance of classificatory botany under the in.fluen.ce of Linnaeus.
For further classificatory details, reference must be made to the special articles on the various orders.
Be that as it may, he declares that characters drawn from the sternum or the pelvis - hitherto deemed to be, next to the bones of the head, the most important portions of the bird's framework - are scarcely worth more, from a classificatory point of view, than characters drawn from the bill or the legs; while pterylological considerations, together with many others to which some systematists had attached more or less importance, can only assist, and apparently must never be taken to control, the force of evidence furnished by this bone of all bones - the anterior palatal.
Escaped the observation of Nitzsch, but he had scarcely used it as a classificatory character.
The new essays in this volume were mostly critical, but one of them, in which perhaps his guessing talent is seen at its best, "The Divisions of the Irish Family," is an elaborate discussion of a problem which has long puzzled both Celtic scholars and jurists; and in another, "On the Classificatory System of Relationship," he propounded a new explanation of a series of facts which, he thought, might throw light upon the early history of society, at the same time putting to the test of those facts the theories he had set forth in Primitive Marriage.
The most ready means of noting the progress of zoology during the 16th, 17th and 18th centuries is to compare the Aristotle's classificatory conceptions of successive naturalists classifi- with those which are to be found in the works of cation.
It is not easy to exaggerate the service rendered by Owen to the study of zoology by the introduction of this apparently small piece of verbal mechanism; it takes place with the classificatory terms of Linnaeus.
Of classificatory value, and p, p, Pericardial cavity.
Obviously these two conditions may merge into one another, and the distinction is not of classificatory value.
The dual nature of the lichen thallus introduces at the outset a classificatory difficulty.
Immediately after his admission into the Royal Society he was induced by Bishop John Wilkins to translate his Real Character into Latin, and it seems he actually completed a translation, which, however, remained in manuscript; his Methodus plantarum nova was in fact undertaken as a part of Wilkins's great classificatory scheme.
The question of species in the bacteria is essentially the same as in other groups of plants; before a form can be placed in a satisfactory classificatory position its whole lifehistory must be studied, so that all the phases may be known.
Thus while Plato hoped to ascend through classificatory science to the knowledge of eternal and immutable laws of thought and being, Speusippus, abandoning ontological speculation, was content to regard classificatory science not as a means but as an end, and (6) to rest in the results of scientific observation.
But, whereas the new scholarch, confining himself to the detailed examination of natural kinds, attempted no comprehensive explanation of the universe, Aristotle held that a theory of its origin, its motions, and its order was a necessary adjunct to the classificatory sciences; and in nearly all his references to Speusippus he insists upon this fundamental difference of procedure.
When they, the immediate successors of Plato, rejected their master's ontology and proposed to themselves as ends mere classificatory sciences which with him had been means, they bartered their hope of philosophic certainty for the tentative and provisional results of scientific experience.
Xenocrates indeed, identifying ideal and mathematical numbers, sought to ' That Plato did not neglect, but rather encouraged, classificatory science is shown, not only by a well-known fragment of the comic poet Epicrates, which describes a party of Academics engaged in investigating, under the eye of Plato, the affinities of the common pumpkin, but also by the Timaeus, which, while it carefully discriminates science from ontology, plainly recognizes the importance of the study of natural kinds.
The lastnamed method has proved little more than that there is a remarkable similarity between the zooids of all recent corals, the differences which have been brought to light being for the most part secondary and valueless for classificatory purposes.
Most of the elements combine with oxygen in several proportions, for example nitrogen has five oxides: N 2 0, NO, N 2 0 3, NO 2, N205; for classificatory purposes, however, it is advantageous to assign a typical oxide to each element, which, in general, is the highest having a basic or acid character.