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Elizabeth Cary Agassiz, Louis Agassiz: his life and correspondence, third edition, Chapter 7: 1834-1837: Aet. 27-30. (search)
the numbers of your Fossil Fishes, which have not yet come. Humboldt often speaks of them to me. Ah! how much I prefer you in a field which is wholly your own than in one where you break in upon the measured and cautious tread, introduced by Saussure in geology. You, too, will reconsider all this, and will yet treat the views of Saussure and Escher with more respect. Everything here turns to infusoria. Ehrenberg has just discovered that an apparently sandy deposit, twenty feet in thicknesSaussure and Escher with more respect. Everything here turns to infusoria. Ehrenberg has just discovered that an apparently sandy deposit, twenty feet in thickness, under the Luneburgerheyde, is composed entirely of infusoria of a kind still living in the neighborhood of Berlin. This layer rests upon a brown deposit known to be ten feet in thickness. The latter consists, for one fifth of the depth, of pine pollen, which burns. The rest is of infusoria. Thus these animals, which the naked eye has not power to discern, have themselves the power to build up mountain chains. . . .