We do not know how far the imaginations about Prester John retained their vitality in 1221, forty-four years after the letter of Pope Alexander, for we know of no mention of Prester John in the interval.
Neither the immense fortunes amassed by these men, nor the venality and robust vitality which made their families veritable races of ministers, altered the fact that De Lionne, Le Tellier, Louvois and Colbert were in themselves of no account, even though the parts they played were much more important than Louis XIV.
The liver being regarded as the seat of the blood, it was a natural and short step to identify the liver with the soul as well as with the seat of life, and therefore as the centre of all manifestations of vitality and activity.
Hybridization can also be readily controlled in the case of tobaccos, and in this connexion it is useful to note that, if pollen is desired of some variety growing at a distance, it will retain its vitality for several weeks if kept perfectly dry, and so can readily be sent by post from one place to another.
The fact, however, appears to be that the prominence given to the heart in popular beliefs dates from the time when in the course of the development of anatomical knowledge the important function of the heart in animal life came to be recognized, whereas the supposition that the liver is the seat of vitality rests upon other factors than anatomical knowledge, and, being independent of such knowledge, also antedates it.
In his next work, Die Meistersinger, Wagner ingeniously made poetry and drama out of an explicit manifesto to musical critics, and proved the depth of his music by developing its everyday resources and so showing that its vitality does not depend on that extreme emotional force that makes Tristan and Isolde almost unbearably poignant.
Kingsley's life was written by his widow in 1877, entitled Charles Kingsley, his Letters and Memories of his Life, and presents a very touching and beautiful picture of her husband, but perhaps hardly does justice to his humour, his wit, his overflowing vitality and boyish fun.
While the majority of the Nematodes are parasites, there are many that are never at any period of their life parasitic. These free-living forms are found everywhere - in salt and fresh water, in damp earth and moss, and among decaying substances; they are always minute in size, and like many other lower forms of life, are capable of retaining their vitality for a long period even when dried, which accounts for their wide distribution; this faculty is also possessed by certain of the parasitic Nematodes, especially by those which lead a free existence during a part of their life-cycle.
It seemed hardly possible that by such comparatively small mouthfuls he could keep up the vitality diffused through so broad, baronial, and superb a person.
In the laboratory absolute soil dryness is as distinctly antagonistic to the vitality of the diphtheria bacillus as soil dampness is favourable.