Un guide de référence des sciences médicales, qui englobe l'ensemble des connaissances scientifiques et pratiques de la médecine et de la science alliée . ge dont il les rendements peuvent actas émollient. Il n'y a pas de dose fixe. H. H. RusBT. La maladie de la lèvre d'Baelzs. Myxadenitis LabialU à voir. von Baer, Karl Ernst-né à Piep, dans theProvince de Esthonia, la Russie, le 29 février, 1792.Il a étudié la médecine, d'abord à l'Université de Dorpat, et alors atWiirzburg. À un earlyperiod hedevoted de sa carrière à thestudy lui-même de l'évolution. Atfirst il collaboratedwith instudies C. H. flatter sur l'élaboration du poussin.Plus tard, il s'ext

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A reference handbook of the medical sciences, embracing the entire range of scientific and practical medicine and allied science . ge which it yields may actas a demulcent. There is no fixed dose. H. H. RusBT. Baelzs Disease of the Lip.—See Myxadenitis LabialU. von Baer, Karl Ernst—Born at Piep, in theProvince of Esthonia, Russia, February 29, 1792.He studied medicine, first at the Universityof Dorpat, and then atWiirzburg. At an earlyperiod of his career hedevoted himself to thestudy of evolution. Atfirst he collaboratedwith C. H. Pander instudies on the develop-ment of the chick.Later, he extended hisresearches to the evolu-tion of organisms gen-erally. In 1817 hewas inited by his oldteacher, K. F. Burdach, then Professor of Anat-omy at Konigsberg, tobecome his prosectorand chief of the newZoological Museum inthat city. He accepted the in^^tation, and continuedhis re.searches with renewed vigor. In 1827 he pub-lished, at Leipzig, the now famous treatise entitled:Epistola de ovo mammalium et hominis genesi, awork in which appears for the first time a descriptionof his great discovery of the human ovum. In the. Fig. 612.—Karl Ernst v. Baer. REFERENCE HANDIiOOK OF THE MEDICAL SCIENCES Bailey Sprlnics following year (1S2S) he publislicd tho first part ofhis largor worlc, Ueber die Entwickclungsgesrliiclitodor Tliicre. The second part was not publisheduntil nine years later (ls:i7). In ISii.j von Baerpublished his treatise on the develoijnient of fishes, and in 1S37 lie was appointed leader of an aretic ex-pedition. The remainder of his active life was devotedto researches in geology as well as in biology. In1867 he was awarded the Copley medal. He died atDorpat November 28, 1876. The writer of the biographical sketch of von Baer inthe Encyclopedia Britannica speaks of the value of thisinvestigators contributions to our knowledge ofbiology in the following terms: The influence of vonBaers discoveries has been far-reaching and abiding.Not only was he the pioneer in

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