Before I could get through half a dozen words I meant to soothe, he had once more bounded up, dashed the tears from his eyes, and was again singing some wild, barbaric chant. Abstracting itself from the appeal to its outward sense by melodies of which the language was unknown, my mind soon grew absorbed in meditative conjectures on the singular nature, so wayward, so impulsive, which had forced intimacy on a man grave and practical as myself. I was puzzled how to reconcile so passionate a childishness, so undisciplined a want of self-control, with an experience of mankind so extended by travel, with an education desultory and irregular indeed, but which must, at some time or other, have been familiarized to severe reasonings and laborious studies. In Margrave there seemed to be wanting that mysterious something which is needed to keep our faculties, however severally brilliant, harmoniously linked together,--as the string by which a child mechanically binds the wildflowers it gathers, shaping them at choice into the garland or the chain. [1] "According to the views we have mentioned, we must ascribe life to a gas, that is, to an aeriform body."--Liebig: "Organic Chemistry," Mayfair's translation, p.363.--It is perhaps not less superfluous to add that Liebig does not support the views "according to which life must be ascribed to a gas," than it would be to state, had Dugald Stewart been quoted as writing, "According to the views we have mentioned the mind is but a bundle of impressions," that Dugald Stewart was not supporting, but opposing, the views of David Hume. The quotation is merely meant to show, in the shortest possible compass, that there are views entertained by speculative reasoners of our day which, according to Liebig, would lead to the inference at which Margrave so boldly arrives. Margrave is, however, no doubt, led to his belief by his reminiscences of Van Helmont, to whose discovery of gas he is referring. Van Helmont plainly affirms "that the arterial spirit of our life is of the nature of a gas;" and in the same chapter (on the fiction of elementary complexions and mixtures) says, "Seeing that the spirit of our life, since it is a gas, is most mightily and swiftly affected by any other gas," etc. He repeats the same dogma in his treatise on "Long Life," and indeed very generally throughout his writings, observing, in his chapter on the Vital Air, that the spirit of life is a salt, sharp vapour, made of the arterial blood, etc. Liebig, therefore, in confuting some modern notions as to the nature of contagion by miasma, is leading their reasonings back to that assumption in the Brawn of physiological science by which the discoverer of gas exalted into the principle of life the substance to which he first gave the name, now so familiarly known. It is nevertheless just to Van Helmont to add that his conception of the vital principle was very far from being as purely