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acid action actual already animals appears beds body British called carbonic cause centre character close coal collected colour common condition considerable considered consists containing crystals deposits described direction distinct doubt effect energy engine equal examined existence experiments extent fact fall feet give given glacier heat inches interesting iron island Italy kind known lake less light lower magnet marked mass matter means miles mineral motion nature nearly observed obtained occur organic original passed period plants portion position present pressure probably produced Professor quantity received reference regard remains remarkable ring rocks salt seems seen separate side similar Society solution species specimens substance sufficient supposed surface taken temperature Thamnophilus theory tion valley whole
Página 95 - ... so thick the aery crowd swarmed and were straitened ; till, the signal given, behold a wonder ! they but now who seemed in bigness to surpass earth's giant sons, now less than smallest dwarfs in narrow room throng numberless...
Página 272 - During this long period of universal death, when Nature herself was asleep— the sun, with his magnificent attendants — the planets, with their faithful satellites — the stars in the binary systems — the solar system itself, were performing their daily, their annual, and their secular movements unseen, unheeded, and fulfilling no purpose that human reason can conceive ; lamps lighting nothing — fires heating nothing — waters quenching nothing — clouds screening nothing — breezes fanning...
Página 119 - a class of objects is defined ... as being constituted, in a manner not apparent to the senses, by a modification of some other class of objects or phenomena whose laws are already known.
Página 96 - The intoxicating property of the urine is capable of being propagated ; for every one who partakes of it has his urine similarly affected. Thus, with a very few amanitas, a party of drunkards may keep up their debauch for a week.
Página 90 - To show the use of these terms, and explain the ideas of a store of energy, and of conversions and transformations of energy, various illustrations were adduced. A stone at a height, or an elevated reservoir of water, has potential energy. If the stone be let fall, its potential energy is converted into actual energy during its descent, exists entirely as the actual energy of its own motion at the instant before it strikes, and is transformed into heat at the moment of coming to rest on the ground....
Página 33 - Such was the state of the civilized world, when the Kelts, or Gauls, broke through the thin screen which had hitherto concealed them from sight, and began, for the first time, to take their part in the great drama of the nations. For nearly two hundred years they continued to fill Europe and Asia with the terror of their name ; but it was a passing tempest ; and, if useful at all, it was useful only to destroy.
Página 34 - ... likewise through a considerable length of wire held by two insulated persons, one touching his lower surface and the other his upper. When the •wire was exchanged for glass or...
Página 33 - ... extremity of the animal to the transverse cartilage which divides the thorax from the abdomen, and within these limits they occupy the whole space between the skin of the upper and under surfaces. Each organ is...
Página 93 - Edinburgh, the author has shown that the sun's heat is probably* due to friction in the atmosphere between his surface and a vortex of vapours, fed externally by the evaporation of small planets, in a region of very high temperature round the sun, which they reach by gradual spiral paths, and falling in torrents of meteoric rain, down from the luminous atmosphere of intense resistance, to the sun's surface.