...his time without his mistress, brings him into conflict with the rationalist Von Koren, who believes in Darwinian principles of natural selection and extinction of the weak and useless. Matters come to a head when an outburst from Laevsky leads to a duel. Von Koren is determined to teach Laevksy a lesson. (Introduction by Phil)...

... namely, intercrossing, isolation, num- ber of individuals — Slow action — Extinction caused by Natural Selection —Divergence of Char- acter, related ... ...ation — Action of Natu- ral Selection, through Divergence of Character and Extinction, on the descendants from a common par- ent — Explains the Groupi... ...eral rules in their appearance and disappearance as do single species — On Extinction — On simultaneous changes in the forms of life throughout the wo... ...al or adap- tive characters — Affinities, general, complex and radiating — Extinction separates and defines groups —Morphology, between members of the... ...nd we shall then see how Natural Selection almost in- evitably causes much Extinction of the less improved forms of life and induces what I have calle... ...e economy of nature, with every fact on dis- tribution, rarity, abundance, extinction, and varia- tion, will be dimly seen or quite misunderstood. We ... ...norance, and so high our presump- tion, that we marvel when we hear of the extinction of an organic being; and as we do not see the cause, we invoke c... ... namely, intercrossing, isolation, num- ber of individuals — Slow action — Extinction caused by Natural Selection —Divergence of Char- acter, related ... ...ation — Action of Natu- ral Selection, through Divergence of Character and Extinction, on the descendants from a common par- ent — Explains the Groupi...

...BAHIA BLANCA Bahia Blanca — Geology — Numerous gigantic Quadrupeds —Recent Extinction — Longevity of species — Large Animals do not require a luxurian... ...es of Organization constant — Change in the Zoology of America — Causes of Extinction. HAVING BEEN DELAYED for nearly a fortnight in the city, I was g... ...fe, on what circumstances, occurring only at long intervals, the rarity or extinction of a species may be determined. November 19th. — Passing the val... ...ies from Southern Patagonia to Behring’s Straits. What shall we say of the extinction of the horse? Did those plains fail of pasture, which have since... ...hall be abundant or scanty in numbers. In the cases where we can trace the extinction of a species through man, either wholly or in one lim- ited dist... ...r by the increase of its natural enemies. The evidence of rarity preceding extinction, is more strik- *See the excellent remarks on this subject by Mr... ... such great astonishment at the rarity being carried one step fur- ther to extinction? An action going on, on every side of us, and yet barely appreci... ...— Excursion to Bathurst — Aspect of the Woods — Party of Natives — Gradual Extinction of the Aborigines — Infection generated by associated Men in hea... ...f which, such as the measles,* prove very destructive), and to the gradual extinction of the wild animals. It is said that num- bers of their children...