It ran counter to the ideas suggested in 1527 on the captivity of Clement VII., that England and France should set up independent patriarchates; and its success depended upon the problematical destruction of Charles V.'s power in Italy.
Apart altogether from the facts that this investigation is still in its infancy and that the conditions of experiment are insufficiently understood, its ultimate success is rendered highly problematical by the essential fact that real scientific results can be achieved only by data recorded in connexion with a perfectly nortnal subject; a conscious or interested subject introduces variable factors which are probably incalculable.
Whatever may be the true affinity of these problematical mammals, undoubted rodents are known from the Lower Eocene of both Europe and North America.
Such units frequently occur in pairs, one member of the pair being characterized by the presence, the other by the absence of a problematical body at least comparable with a ferment, the result of the presence or absence being a notable modification of the whole organism or of parts of it.
In the latter part of the 6th century we find some restoration, some revival of the old monarchy in the person of Zerubbabel (520 B.C.); but again the course of events is problematical (JEws, § 20).