The main currents of zoölogy . FIG. 3.—THEODOR SCHWANN (1810-1882) FIG. 4.—THEODOR BOVERI (1866-1916) OUTSTANDING BIOLOGICAL ADVANCES 17 no matter how complex, begin their existence in thecondition of a single cell. This master-stroke of generalizationr had awonderful unifying effect in bringing all animals andplants under one view as to origin and structure. The names of two men, Schleiden and Schwann,are associated with the launching of this was a botanist, and Schwann, an anat-omist—a happy combination in biological investi-gation. They are commonly spoken of as theco-found
The main currents of zoölogy . FIG. 3.—THEODOR SCHWANN (1810-1882) FIG. 4.—THEODOR BOVERI (1866-1916) OUTSTANDING BIOLOGICAL ADVANCES 17 no matter how complex, begin their existence in thecondition of a single cell. This master-stroke of generalizationr had awonderful unifying effect in bringing all animals andplants under one view as to origin and structure. The names of two men, Schleiden and Schwann,are associated with the launching of this was a botanist, and Schwann, an anat-omist—a happy combination in biological investi-gation. They are commonly spoken of as theco-founders of the cell-theory. This statement, how-ever, requires qualification, for the part played bythe two men was very unequal. Schwann, so tospeak, was the star and Schleiden played a subordi-nate part. Schleidens work was auxiliary. He had observedcell formation and cell structure of plants and pub-lished a small paper on this subject in 1838. In afriendly conference, he assisted Schwann, whoseresearches were already the
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