...produced by the attempts of animals to inerease the development of thcir own organs, and thus modify thcir structure and habits — has been repeatedly and easily...developed renders such an hypothesis quite unnecessary, by showing that similar results must be produced by the action of principles constantly at work in nature....

...preserve its existence and continue its race. Lamarck's Hypothesis very different from that now advanced. The hypothesis of Lamarck — that progressive changes...question has been finally settled ; but the view here develoI,ed renders such hypothesis quite unnecessary, by showing that similar results must be produced...

...preserve its existence and continue its race. Lamarck's Hypothesis very different from that now advanced. The hypothesis of Lamarck — that progressive changes...whole question has been finally settled ; but the viewhere developed renders such hypothesis quite unnecessary, by showing that similar results must,...

...to increase the development of their own organs, and thus modify their structure and habits—-has been repeatedly and easily refuted by all writers...settled; but the view here developed renders such hypothesis quite unnecessary, by showing that similar results must be produced by the action of principles...

...progressive changes in species have been produced by the attempts of animals to increase the developments of their own organs, and thus modify their structure...settled ; but the view here developed renders such hypothesis quite tmnecessary, by showing that similar results must be produced by the action of principles...

...enough the difference between the theory of " natural selection " and that of Lamarck. He wrote : — " The hypothesis of Lamarck — that progressive changes...all writers on the subject of varieties and species, . . . but the view here developed renders such an hypothesis quite unnecessary . . . The powerful retractile...

...enough the difference between the theory of " natural selection " and that of Lamarck. He wrote : — " The hypothesis of Lamarck — that progressive changes...-writers on the subject of varieties and species, . . . but the view here developed renders such a hypothesis quite unnecessary . . . The powerful retractile...

...enough the difference between the theory of " natural selection " and that of Lamarck. He wrote : — " The hypothesis of Lamarck — that progressive changes...all writers on the subject of varieties and species, . . . but the view here developed renders such an hypothesis quite unnecessary . . . The powerful retractile...

...them to wild animals, will be preserved. Those individuals which do not vary sufficiently will perish. increase the development of their own organs, and...developed renders such an hypothesis quite unnecessary, by showing that similar results must be produced by the action of principles constantly at work in nature....

...been produced by the attempts of animals to increase the development of their own organs, and thus to modify their structure and habits — has been repeatedly...and easily refuted by all writers on the subject." — WALLACE : " On the Tendency of Varieties to depart indefinitely from the Original Type," Journ....