Ridpath's history of the world; being an account of the ethnic origin, primitive estate, early migrations, social conditions and present promise of the principal families of men .. . NIL LOWER LIMBS OF UNGULATE ANIMALS—SHOWING THE PROGRESSIVE DEVELOPMENT(MARKED A, B, C, D, e) OF ORGANS. in the essentials of their structure andform. One not familiar with the factmust needs be astonished to note how,under the investigations of comparativeanatomy, the fundamental parts of allliving creatures more and more approx-imate a common type, from which theseveral species and varieties have beeninflected t
Ridpath's history of the world; being an account of the ethnic origin, primitive estate, early migrations, social conditions and present promise of the principal families of men .. . NIL LOWER LIMBS OF UNGULATE ANIMALS—SHOWING THE PROGRESSIVE DEVELOPMENT(MARKED A, B, C, D, e) OF ORGANS. in the essentials of their structure andform. One not familiar with the factmust needs be astonished to note how,under the investigations of comparativeanatomy, the fundamental parts of allliving creatures more and more approx-imate a common type, from which theseveral species and varieties have beeninflected to a certain limit only by theconditions of environment, including theoperation of natural selection, or strug-gle for life, and the survival of the skeletons of all vertebrates approx-imate a single pattern. This pattern in 210 GREAT RACES OF MANKIND. turn approximates the basal structure ofthe invertebrata; and so on with the en-largement of the investigation all animatebeings are seen to approach to one com-mon rudimentary form, insomuch thatthe inquirer might be induced to believe. THE SPECTROSCOPE. that nature has had but a single patternin her laboratory of possibilities! The effect of these discoveries in biol-ogy must needs be great in leading themind toward a wider con- Theminddis- covers the law cept of uniformity, t irst,ofuniformity. wg haye the actual demon-stration of the modes and processes bywhich mature organism is reached in the
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Keywords: ., bookcentury1800, bookdecade1890, booksub, booksubjectworldhistory
