Du Bois-Reymond's final judgment is of special interest, because it tries to point out the comparative place that will be occupied by three great men in the biological sciences of a century ago: "Haller and Müller must be considered as giants of earlier days, though when future generations compare them with Cuvier they will occupy somewhat of the position that Galileo and Newton hold in comparison to La Place and Gauss, or Lavoisier in comparison to Berzelius. The first of these men had the opportunity to do great things while it was yet possible to do them, and left to their successors only the possibility of developing their thoughts." [Footnote 9] [Footnote 9: Some idea of the estimation in which Müller was held by his contemporaries, German and foreign, may be gathered from the number of scientific bodies of which he was a member. He was an associate in practically every serious scientific body in Germany. He was, besides, foreign member of the scientific academies at Stockholm, Munich, Brussels, Amsterdam; the scientific societies of Göttingen, London, Edinburgh, Copenhagen; foreign honorary member of the Academy of Sciences of Vienna; corresponding member of the Academies of St. Petersburg, Turin, Bologna, Paris and Messina; of the Society for Science at Upsala, of the Mecklenburg Naturalist Society of Rostock, of the Senkenberg Institute of Frankfort-on-Main, of the Academy of Natural Sciences of Philadelphia, of the Society of the Museum of Natural History at Strasbourg, of the Naturalists' Association of Dutch East India; member of the Holland Society of Sciences, Haarlem; of the Naturalist Society of Frieburg in Breisgau, Halle, Dantzig and Mainz; of the American Philosophical Society of Philadelphia, of the Society of Biology of Paris; honorary member of the Cambridge Philosophical Society, of the Natural Science Union of Hamburg, and the Natural Science Association of the Prussian Rheinland and Westphalia, of the American Academy of Arts and Sciences in Boston, of the Ethnological Society of London, of the Microscopic Association of Giessan, member of the Society for Science and Medicine at Heidelburg, of the Naturalists' Society at Dresden; corresponding member of the Scientific and Medical Association of Erlangen and Moscow; member of the Academy of Medicine of Paris; honorary member of the Academy of Medicine of Prague and of Dorpat, of the Medico-Chirurgical Academies of Wilna and of St. Petersburg, of the Medical Society of Guy's Hospital in London, of the Medical Society of Edinburgh and of the Hunterian Society of the same city, and of the Medico-Chirurgical Societies of London and of Zurich, of the Medical Societies of Budapest, of Lisbon, of Algiers and Constantinople; corresponding member of the Medico-Chirurgical Academy of Turin and of the Medical Society of