Contributions to the Theory of Natural Selection: A Series of Essays |
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Page 18
... equally unfavourable to the creation of new ones . In this too we may find an analogy with the present state of our earth , for it has been shown to be the violent extremes and rapid changes of phy- sical conditions , rather than the ...
... equally unfavourable to the creation of new ones . In this too we may find an analogy with the present state of our earth , for it has been shown to be the violent extremes and rapid changes of phy- sical conditions , rather than the ...
Page 22
... equally limited in area and in number with those actually laid open for the collection of fossils . Now , the hypothesis of Professor Forbes is essentially one that assumes to a great extent the completeness of our knowledge of the ...
... equally limited in area and in number with those actually laid open for the collection of fossils . Now , the hypothesis of Professor Forbes is essentially one that assumes to a great extent the completeness of our knowledge of the ...
Page 26
... Society for August , 1858 . prejudiced belief in the stability of species . Equally general -On the Tendency of Varieties to depart indefinitely from Original Type Instability of Varieties supposed to prove the permanent distinctness.
... Society for August , 1858 . prejudiced belief in the stability of species . Equally general -On the Tendency of Varieties to depart indefinitely from Original Type Instability of Varieties supposed to prove the permanent distinctness.
Page 27
... Equally general , however , is the belief in what are called 66 permanent or true varieties , " - races of animals which continually propagate their like , but which differ so slightly ( although constantly ) from some other race , that ...
... Equally general , however , is the belief in what are called 66 permanent or true varieties , " - races of animals which continually propagate their like , but which differ so slightly ( although constantly ) from some other race , that ...
Page 50
... equally striking are the cases of arctic animals possessing the white colour that best con- ceals them upon snowfields and icebergs . The polar bear is the only bear that is white , and it lives constantly among snow and ice . The ...
... equally striking are the cases of arctic animals possessing the white colour that best con- ceals them upon snowfields and icebergs . The polar bear is the only bear that is white , and it lives constantly among snow and ice . The ...
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Contributions to the Theory of Natural Selection: A Series of Essays ... Alfred Russel Wallace No preview available - 2018 |
Contributions to the Theory of Natural Selection: A Series of Essays Alfred Russel Wallace No preview available - 2016 |
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abundant adapted affinity animals antennæ antitypes appear beauty become beetles believe birds Borneo brain build butterflies caterpillars causes Celebes changes character closely allied species colour concealed conspicuous Crown 8vo curious Danaidæ Darwin Diphilus distinct earth Edition eggs epoch essay exactly example existence explained extinct facts faculties favourable flowers genera genus geological geological periods groups habits Heliconidæ Illustrations imitation India individuals inhabiting insects instinct islands Java larvæ Lepidoptera less Malayan male mimic mimicry mode modifications Moluccas moths natural selection nectary nest never nidification number of species observations occur Origin of Species Ormenus Pammon Papilio Papilio Ulysses Papilionidæ peculiar period phenomena physical Polydorus possess present probably produced Professor protection race regions remarkable render resemble savage Science sexes sexual selection shown structure Sumatra tail theory of natural Theseus tints tion TREATISE trees tropical University variation varied varieties whole wings
Popular passages
Page 361 - But the passage from the physics of the brain to the corresponding facts of consciousness is unthinkable. Granted that a definite thought and a definite molecular action in the brain occur simultaneously; we do not possess the intellectual organ, nor apparently any rudiment of the organ, which would enable us to pass, by a process of reasoning, from the one to the other.
Page 4 - AN ELEMENTARY TREATISE ON THE LUNAR THEORY, with a Brief Sketch of the Problem up to the time of Newton. Second Edition, revised. Crown 8vo. cloth. 5*. 6d. Hemming. — AN ELEMENTARY TREATISE ON THE DIFFERENTIAL AND INTEGRAL CALCULUS, for the Use; of Colleges and Schools.
Page 20 - Flower (WH) — AN INTRODUCTION TO THE OSTEOLOGY OF THE MAMMALIA. Being the Substance of the Course of Lectures delivered at the Royal College of Surgeons of England in 1870.
Page 368 - WILL, while we have no knowledge of any other primary cause of force, it does not seem an improbable conclusion that all force may be will-force; and thus, that the whole universe is not merely dependent on, but actually is, the WILL of higher intelligences or of one Supreme Intelligence.
Page 1 - With the Mathematical Elements of Music. Designed for the Use of Students in the University. Second Edition, Revised and Enlarged. Crown 8vo. gs. A TREATISE OF MAGNETISM. Designed for the Use of Students in the University.
Page 4 - HEMMING— AN ELEMENTARY TREATISE ON THE DIFFERENTIAL AND INTEGRAL CALCULUS, for the Use of Colleges and Schools. By GW HEMMING, MA, Fellow of St. John's College, Cambridge. Second Edition, with Corrections and Additions. 8vo.
Page 4 - JACKSON — GEOMETRICAL CONIC SECTIONS. An Elementary Treatise in which the Conic Sections are defined as the Plane Sections of a Cone, and treated by the Method of Projection. By J. STUART JACKSON, MA, late Fellow of Gonville and Caius College, Cambridge.
Page 8 - World : a Simple Account of Man in Early Times. Sixth Edition. Crown 8vo. Cloth, price 3$. A Special Edition for Schools. Price is. The Childhood of Religions.
Page 326 - natural selection' himself, but he is actually able to take away some of that power from nature which, before his appearance, she universally exercised. We can anticipate the time when the earth will produce only cultivated plants and domestic animals ; when man's selection shall have supplanted
Page 8 - The book will doubtless find a place in the library, not only of the scientific geologist, but also of all who are desirous of the industrial progress and commercial prosperity of the Acadian provinces.