The Harvard Classics, Volum 30P.F. Collier & son, 1910 |
Altres edicions - Mostra-ho tot
Frases i termes més freqüents
action atmosphere attraction ball basin battery beautiful become bodies bottle bubble burn candle carbonic acid centimetre centre charcoal chemical affinity Col du Géant combustion condensation contains copper crevasses cubic foot cylinder distance earth effect electricity experiment feet fire flame flask fluid give Glace glacier glass gravity HC VOL heat hydrogen illustration inches iron kind lamp land lecturer light lime-water liquid luminiferous ether machine magnet mass means melt Mer de Glace metal mixture moon motion mountain moving natural Nicol prism observe oxygen particles phosphorus pieces of ice plate platinum pressure produced quantity result rocks round shellac side snow solid stars steam substance suppose surface take a piece temperature thing tidal tides tion tube vapor velocity vessel vibrations vis viva wave wave-length weight whole wire zinc
Passatges populars
Pàgina 250 - ... from the size of a pin's head to that of a pea ; scattered through a large body of sand or clay ; and in this state it is called by the Mandingoes sanoo munko,
Pàgina 89 - I shall not disappoint you in choosing this for my subject rather than any newer topic, which could not be better, were it even so good. And, before proceeding, let me say this also: that, though our subject be so great, and our intention that of treating it honestly, seriously, and philosophically, yet I mean to pass away from all those who are seniors among us. I claim the privilege of speaking to juveniles as a juvenile myself. I have done so on former occasions, and, if you please, I shall do...
Pàgina 347 - From the earliest geological times the great area of deposit has been, as it still is, the marginal belt of sea-floor skirting the land. It is there that nature has always strewn " the dust of continents to be." The decay of old rocks has been unceasingly in progress on the land, and the building up of new rocks has been unintermittently going on underneath the adjoining sea. The two phenomena are the complementary sides of one process, which belongs to the terrestrial and shallow oceanic parts of...
Pàgina 313 - A Description of a Machine for finding the Numerical Roots of Equations and tracing a Variety of Useful Curves," of which a short notice appears in the British Association Report for that year.
Pàgina 4 - Taking him for all in all, I think it will be conceded that Michael Faraday was the greatest experimental philosopher the world has ever seen; and I will add the opinion, that the progress of future research will tend, not to dim or to diminish, but to enhance and glorify the labours of this mighty investigator.
Pàgina 97 - ... the fluid, that you may see the action better.) You observe that, now I pour in the fluid, it rises and gradually creeps up the salt higher and higher; and provided the column does not tumble over, it will go to the top. If this blue solution were combustible, and we were to place a wick at the top of the salt, it would burn as it entered into the wick. It is a most curious thing to see this kind of action taking place, and to observe how singular some of the circumstances are about it. When...
Pàgina 175 - ... supply his natural warmth in that time. All the warm-blooded animals get their warmth in this way, by the conversion of carbon, not in a free state, but in a state of combination. And what an extraordinary notion this gives us of the alterations going on in our atmosphere. As much as 5,000,000 pounds, or 548 tons, of carbonic acid is formed by respiration in London alone in twenty-four hours.
Pàgina 231 - ... must first carefully select every step for his feet. And yet these blue chasms, which lie open and exposed in the daylight, are by no means the worst dangers of the glacier; though, indeed, we are so organised that a danger which we perceive, and which therefore we can safely avoid, frightens us far more than one which we know to exist, but which is veiled from our eyes. So also it is with glacier chasms. In the lower part of the glacier they yawn before us, threatening death and destruction,...
Pàgina 176 - So are we made dependent not merely upon our fellow-creatures, but upon our fellow-existers, all Nature being tied together by the laws that make one part conduce to the good of another. There is another little point which I must mention before we draw to a close — a point* which concerns the whole of these operations, and most curious and beautiful it is to see it clustering upon and associated with the bodies that concern us—oxygen, hydrogen, and carbon, in different states of their existence.
Pàgina 96 - ... one or two instances of capillary attraction. It is that kind of action or attraction which makes two things that do not dissolve in each other still hold together. When you wash your hands, you wet them thoroughly; you take a little soap to make the adhesion better, and you find your hand remains wet. This is by that kind of attraction of which I am about to speak. And, what is more, if your hands are not soiled (as they almost always are by the usages of life), if you put your finger into a...