316 SCIENTIFIC THOUGHT. 



many passages of the ' Hydrogeologie,' where he specu- 

 lated on matters of chemistry, geology, and meteorology 

 without the necessary foundation of facts, such as he 

 possessed in botany and zoology, he laid himself open 

 to the criticism and ridicule ^ of his more cautious 

 opponents. Thus it happened that the most original con- 

 tributions to science were forgotten or disregarded for 

 more than half a century, after which time Lamarckism 

 became a familiar term in speculative science, denoting 

 one of the great ideas with which the genetic view of 

 nature operates — viz., the influence of environment, 

 adaptation, acquired habits, in the development of living 

 organisms. 

 23. In the history of the genetic view of nature, the 



Lamarck 



^nd von positiou of Lamarck may be regarded as, in a certain 

 sense, complementary to that of von Baer. Both brought 

 the study of living forms back to that of their origins 

 — Lamarck to the study of the lowest forms of animal 

 creation, the great variety and abundance of which he 

 was the first to attempt to put into some order ; von 

 Baer to the study of the embryonic beginnings of the 

 higher organisms, on which important subject he was 

 one of the first to throw some light. Though widely 



^ See, inter alia, what Cuvier 

 wrote in his ' Eloge de Lamarck,' 

 which was read posthumously in 



meme paix que la theorie chim- 

 ique " ; and farther on he touches 

 on one of the weakest points of all 



the Academy by Silvestre, ■26th ■, genetic speculations (p. sxii) : " Le 



November 1832 (' Mem. de I'Acad. i temps sans borne qui joue un si 



des Sciences,' vol. xiii. p. xx), j grand role dans la religion des 



with omissions to tone down its I mages, n'en joue pas un moins 



severity : ' ' Quelque int^ret que ces | grand dans toute cette physique 



ouvrages excitassent par leurs par- \ de M. de Lamarck, et c'etait sur 



ties po.sitives, personne ne crut lui qu'il se reposait pour calmer ses 



leur partie systematique assez ' propies doutes et pour repondre 



<langereuse pour meriter d'etre ] a toutes les objections de ses 



attaquee ; on la laissa dans la ' lecteurs." 



