Modern Achievement, Volumen7University Soc., 1902 |
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Términos y frases comunes
ALFRED RUSSEL WALLACE animals appear atomic weights bees birds body called carbonic acid carried causes cells century chalk Clidastes coal cobra color comet cooled Cretaceous Crookes tube crust crystalline lens discovery distance double star earth electric ELISHA GRAY ether ether waves existence experiment fact feet fire fossils gases geologists glaciers glass globe Globigerinæ ground hand heat hive hundred inch invention kind kite land layers light liquefied liquid air living longitudinal waves machine means miles mosasaurs motion motor mountain move nature nitrogen object observed ocean operation oxygen passed phenomena photograph planet present produced rays retina rocks seen shoe side skeleton snakes solid sound species spiders stars striking substance surface telescope temperature theory thickness thousands tion tube vapor vegetable vehicle vibrations Viperida waves weight wheel whole wings wire
Pasajes populares
Página 336 - every species has come into existence coincident both in space and time with a pre-existing closely allied species.
Página 202 - ... coverings and appendages by putrefaction ; and that, after this had happened, another animal might attach itself to the dead and naked skeleton, might grow to maturity, and might itself die before the calcareous mud had buried the whole. Cases of this kind are admirably described by Sir Charles Lyell. He speaks of the frequency with which geologists find in the chalk a fossilized sea-urchin, to which is attached the lower valve of a Crania. This is a kind of shell-fish, with a shell composed...
Página 193 - Mediterranean. Thus the chalk is no unimportant element in the masonry of the earth's crust, and it impresses a peculiar stamp, varying with the conditions to which it is exposed, on the scenery of the districts in which it occurs. The undulating downs...
Página 205 - Cromer, you will see the boulder clay forming a vast mass, which lies upon the chalk, and must consequently have come into existence after it. Huge boulders of chalk are, in fact, included in the clay and have evidently been brought to the position they now occupy, by the same agency as that which has planted blocks of syenite from Norway side by side with them.
Página 206 - And not only do the remains of stately oaks and well-grown firs testify to the duration of this condition of things, but additional evidence to the same effect is afforded by the abundant remains of elephants, rhinoceroses, hippopotamuses, and other great wild beasts, which it has yielded to the zealous search of such men as the Rev. Mr. Gunn. When you look at such a collection as he has formed, and bethink you that these elephantine bones did veritably carry their owners about, and these great grinders...
Página 134 - They have likewise discovered two lesser stars, or satellites, which revolve about Mars; whereof the innermost is distant from the centre of the primary planet exactly three of his diameters, and the outermost, five; the former revolves in the space of ten hours, and the latter in twenty-one and a half...
Página 192 - If a well were to be sunk at our feet in the midst of the city of Norwich, the diggers would very soon find themselves at work in that white substance almost too soft to be called rock, with which we are all familiar as "chalk.
Página 213 - FIRST-BORN among the Continents, though so much later in culture and civilization than some of more recent birth, America, so far as her physical history is concerned, has been falsely denominated the New World. Hers was the first dry land lifted out of the waters, hers the first shore washed by the ocean that enveloped all the...
Página 283 - Make a small cross of two light strips of cedar, the arms so long as to reach to the four corners of a large thin silk handkerchief when extended...
Página 209 - Indians. Crocodiles of modern type appear; bony fishes, many of them very similar to existing species almost supplant the forms of fish which predominate in more ancient seas; and many kinds of living shellfish first become known to us in the chalk.