" BEFORE the great problems [of Biology], the cleft between Zoology 

 and Botany fades away, for the same problems are common to the twin 

 sciences. When the zoologist becomes a student not of the dead but of 

 the living, of the vital processes of .the cell rather than of the dry bones 

 of the body, he becomes once more a physiologist and the gulf between 

 these two disciplines disappears. When he becomes a physiologist, he 

 becomes, ipso facto, a student of chemistry and physics." 



D'ARCY THOMPSON, " Magnalia Naturae." 



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