Mit mondanak mások - Írjon ismertetőt
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action actions and reactions active adaptation America amphibians ancestral animals appear aquatic atmosphere bacteria become beginning birds body Cambrian carbon causes cell changes characters chemical chief chromatin closely colloids compared complex compounds continuous Cretaceous deposits dinosaurs direction discovered early earth elements energy entirely environment essential evolution evolve example existing fishes follows fossil four function germ habitat heat higher hydrogen important individual interaction internal iron known less light limbs lines living lower mammals marine matter mechanical motion Museum namely Natural nitrogen North America observed ocean organism origin oxygen period Permian phase physical physicochemical plants present primitive primordial principle probably processes proportion protoplasm radiation reactions recent region relatively represent reptiles REPTILIA rise seas selection showing similar species stage structure substances surface terrestrial theory tion Triassic types Upper vertebrates zones
12. oldal - Every body continues in its state of rest, or of uniform motion in a right line, unless it is compelled to change that state by forces impressed upon it.
57. oldal - It will, in short, become possible to introduce into the economy a molecular mechanism which, like a very cunningly- contrived torpedo, shall find its way to some particular group of living elements, and cause an explosion among them, leaving the rest untouched.
12. oldal - Lex I Corpus omne perseverare in statu suo quiescendi vel movendi uniformiter in directum, nisi quatenus illud a viribus impressis cogitur statum suum mutare.
13. oldal - To every action there is always opposed an equal reaction: or, the mutual actions of two bodies upon each other are always equal and directed to contrary pans.
xi. oldal - It is quite certain that we cannot become sufficiently acquainted with organized creatures and their hidden potentialities by aid of purely mechanical natural principles, much less can we explain them ; and this is so certain, that we may boldly assert that it is absurd for man even to conceive such an idea, or to hope that a Newton may one day arise able to make the production of a blade of grass comprehensible, according to natural laws ordained by no intention; such an insight we must absolutely...
13. oldal - Actioni contrariam semper et aequalem esse reactionem: sive corporum duorum actiones in se mutuo semper esse aequales et in partes contrarias Doesn't make much sense?
240. oldal - But the causes and conditions of variation have yet to be thoroughly explored, and the importance of natural selection will not be impaired, even if further enquiries should prove that variability is definite, and is determined in certain directions rather than in others by conditions inherent in that which varies.
9. oldal - Nature produces those things which, being continually moved by a certain principle contained in themselves, arrive at a certain end."2 What this internal moving principle is remains to be discovered.
36. oldal - The amount of calcium carbonate in the oceans cannot be used as a basis for an estimate of their age, since some of it is precipitated upon reaching the salt water, and much of it is used by animals and plants for their skeletons and shells. MOVEMENT OF THE WATER Wave Motion. — Since marine erosion...
viii. oldal - The demonstration of evolution as a universal law of living nature is the great intellectual achievement of the nineteenth century. Evolution has outgrown the rank of a theory, for it has won a place in natural law beside Newton's law of gravitation, and in one sense holds a still higher rank, because evolution is the universal master, while gravitation is one among its many agents.