ROUX 317 



book, Der Kampf der TJici/c iui Orgamsums, which contained 

 the working-out of his mechanistic explanation of functional 

 adaptation, and most of the elements of his general "causal- 

 analytical " theory of form production. The significance of 

 the book was popularly considered at the time to lie in its 

 supposed application of the selection idea to the explanation 

 of the internal adaptedness of animal structure in the theory 

 of "cellular selection," and the book owed its success to its 

 fitting in so well with the prevalent Darwinism of the day. 

 But its real importance, as a big step towards causal mor- 

 phology, was naturally not so fully appreciated. 



During the next few years Roux continued his studies 

 on functional adaptation, 1 and at the same time made a new 

 departure by inaugurating, almost contemporaneously with 

 the physiologist Pfltiger, the study of experimental embry- 

 ology. Isolated observations had previously been made upon 

 the development of single blastomeres or parts of blastula?, 

 by Haeckel and Chun for instance, 2 but Roux 3 and Pfliiger 4 

 were the first to investigate the subject systematically, 

 choosing for their work the egg of the frog/' Roux con- 

 tinued for many years to follow up this line of work. 



In 1890 he drew up a programme and manifesto 7 of 

 Entwicklungsmechanik as " an anatomical science of the 



1 " Beitriige zur Morphologic der funktionellen Anpassung. I. 

 Struktur eines hochdifferenzierten bindgevvebigen Organes (der Schwanz- 

 flosse des Delphin)," Arch. Ana/. Physio! . (Anat. Abt.} for 1883. II. 

 "Ueber die Selbstregulation der ' morphologischen ' Lange der 

 Skeletmuskeln des Menschen," Jen. Zeit., xvi., 1883. III. " Beschrei- 

 bting . . . einer Kniegelenkeknochenankylose," Arch. Anat. Physiol. 

 (Anat. Abt.} for 1885. 



' In 1869 and 1877 respectively (Rons, p. 53, 1905). 



3 Ueber die Zeit. der Bcstimmung der Hauptrichtungen des Frosch- 

 embryo, Leipzig, 1883. 



4 " Ueber den Einfluss der Schvverkraft auf die Teilung der Zellen," 

 Pfliiger's Archiv, xxxi., 1883. Also subsequent papers in same journal. 



' For an account of the classical experiments on the frog's egg, see 

 T. H. Morgan, The Development of the Frog's Egg, New York, 1897. 



fl In a series of " Beitnige zur Entwicklungsmechanik des Embryo," 

 published in various journals from 1884 to 1891, all dealing with the 

 frog's egg. Also in many papers in the Archiv f. Enlw.-niecJi., from 

 1895 onwards. 



' Die Entwicklungsmechanik der Organismen, cine anatomische 

 IVisscnschaft der Zuknnft, Wien, 1890. 



